Abstract

Biomedical sensors, integrated into textiles would enable monitoring of many vitally important physiological parameters during our daily life. In this paper we demonstrate the design and performance of a textile based pulse oximeter, operating on the forefinger tip in transmission mode. The sensors consisted of plastic optical fibers integrated into common fabrics. To emit light to the human tissue and to collect transmitted light the fibers were either integrated into a textile substrate by embroidery (producing microbends with a nominal diameter of 0.5 to 2 mm) or the fibers inside woven patterns have been altered mechanically after fabric production. In our experiments we used a two-wavelength approach (690 and 830 nm) for pulse wave acquisition and arterial oxygen saturation calculation. We have fabricated different specimens to study signal yield and quality, and a cotton glove, equipped with textile based light emitter and detector, has been used to examine movement artifacts. Our results show that textile-based oximetry is feasible with sufficient data quality and its potential as a wearable health monitoring device is promising.

© 2008 Optical Society of America

1. Introduction

Customized and wearable health monitoring devices, incorporated into textiles and garments, are expected to become medical attendants in the future for continuous and autonomous monitoring of vital physiological indicators of professionals, patients and elderly persons [1–3]. Textile integrated devices have numerous advantages over portable instruments attached to the skin or carried as discrete appliances close to the body, e.g. reduction of loose connecting wires between sensors, electronics and power supplies would lead to increased reliability, data quality and security, as well as enhanced comfort and mobility would be beneficial for the wearer. Most known textile implementations of wearable devices so far utilize electrically conductive metal threads and coatings or electroactive polymer fibers combined with integrated circuits, sensors and modules to interface with the human body and to acquire and transport biosignals like ECG or respiration rate [4, 5].

On the other hand, the use of textile integrated optical fibers in biomedical applications is a relatively new subject. In the majority of cases, plastic optical fibers (POF) are used [6–8], since they are more resistant to textile manufacturing processes and have a higher safety potential, compared to glass fibers. Optical fibers made of polymeric materials have also the advantage of high flexibility and low stiffness compared to glass fibers; therefore they are receiving more and more attention in the field of smart textiles and will complement electrical wires and sensors in the near future. Furthermore, optical fibers produce no heat, they are insensitive to electromagnetic radiation and they are not susceptible to electrical discharges - significant advantages when used close to biomedical devices (e.g. pace makers, insulin pumps) or in diagnostic environments (MRI).

The history of photonic (=light emitting) textiles based on POF started in the late 1960s, when DuPont was investigating the field of optical polymers and fiber production. One of their first patents already showed the possibility of weaving POF and altering their cladding in a subsequent step to receive luminous effects [9]. Since then, numerous patents have been filed in and were granted to third parties; surprisingly not many applications were entering the market. A few exceptions are luminous fabrics employed in fashion, design and architecture produced e.g. from Luminex [10] and Brochier [11], backlighting devices from Lumitex [12] for switches, keypads, and LCD’s, and a surgical illuminator, also from Lumitex.

Textiles with optical fibers integrated also have found several applications as sensors. A general overview of sensor principles, fiber design and integration into fabrics is given in references [13–19]. The most often used sensing principles are Bragg or long period gratings [20]. The use of such fibers as stress sensors is reported in [21]. The authors introduced a novel technique to measure static and dynamic stress in parachute canopy weaves and suspension lines. Bragg grating fibers used to measure thoracic and abdominal respiration in humans are covered in [22, 23], where medical textiles have been developed and tested in respiratory plethysmography applications. To monitor structural textile composites a variety of different sensors setups has been assembled and investigated [24–28]. Other sensing principles, mostly employed for multimodal POF, are based on the formation of microbends [29–31]. This principle has been applied so far only in few textile applications. Sensor arrays, where optical fibers are placed in warp and weft direction of weaves, allow the determination of touch, pressure and location [32–34]. A different approach for a pressure sensor array is presented in [35], in which elastomeric POF were squeezed and deformed rather than bent.

Photonic textiles outside sensing applications are also covered in the scientific literature. A novel biomedical application is reported in the field of cancer treatment. Luminous embroideries are used to apply light energy to cancerous tissue during photodynamic therapy [36, 37]. The embroideries are thin and flexible and therefore adapt well onto inhomogeneous tissue topologies and body cavities (e.g. intraoral cavity). By attaching the textiles to the patient a more precise and safer treatment could be conducted due to easier dose calculation and reduction of disturbing patient movements. Optical fiber displays and textile illumination devices have also been reported [38, 39]. Their technology mostly is based on woven POF having cladding imperfections (mechanical, thermal, chemical damage) and therefore light emitting sites. Other examples of photonic textiles are using light sources attached inside the fabrics. The most popular approach is driven by Philips' Lumalive technology [40] for fashion and design applications. Light emitting diodes (LED) are distributed inside fabrics (e.g. shirts or furniture), which have electrical threads incorporated. Furthermore, organic light emitting devices (OLED) on fiber [41], electrochromic polymers [42], surface-emitting fiber lasers [43], and microstructured fibers [44] have already shown their potential to deliver novel multifunctional photonic textiles [45].

In principle photonic textiles with a sufficient sensitivity are also of high interest for the near-infrared spectrophotometry and imaging (NIRS and NIRI) community. There are many types of instruments and clinical applications of NIRS and NIRI to assess oxygenation and blood circulation in tissue [reviews: 46–58]. All of these could profit from photonic textiles. To give an example of an application, we focused on pulse oximetry, because it is a well established technique.

In this report, we present our approach of using photonic textiles as wearable pulse oximeters for continuous physiological monitoring of human subjects. Pulse oximetry has been introduced already 20 years ago [59] as a versatile non-invasive tool for monitoring the arterial oxygen saturation of biological tissue. It is nowadays widely used in clinical applications, e.g. in intensive care, emergency and recovery rooms, during anesthesiology or in perinatology [60]. Pulse oximeters usually measure the absorption of light of oxy- and deoxy-hemoglobin (O2Hb and HHb) at two different wavelengths (either in transmission or reflection mode) while attached to the subject’s ear lobe, finger or toe. The two resulting signals have a pulsatile factor (each heart beat changes blood volume in the monitored vessels, which can be solely attributed to arterial blood) and allow consecutive calculation of arterial oxygen saturation (SpO2) [60].

One crucial factor, which determines the signal to noise ratio of the SpO2 measurement, is the loss of light from the finger to the detector, the so-called in-coupling. Light emission by photonic textiles is as stated above, relatively well studied. Therefore, the aim of this study was to determine and optimize the efficiency of the light detection of photonic textiles and whether it is feasible to use such textiles in pulse oximetry. The focus of our work has been on the comparison of woven versus embroidered textiles, incorporating merchantable quality PMMA POF, the measurement of their light emitting and receiving capabilities and the aptitude of the different textile patterns for pulse oximeter design on the fingertip.

 

Fig. 1. Textile techniques used, POF (red), PET fibers (light blue). Left scheme: canvas pattern weaving of POF and PET fibers; middle scheme: Soutage embroidery (PET substrate in light blue, retention stitches in dark blue); right scheme: Schiffli embroidery. Both embroideries are using a canvas type PET weave as substrate.

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2. Materials and methods

2.1 Textile techniques

In our work we have been using three different textile manufacturing techniques to incorporate POF into a two-dimensional fabric. Woven patterns consisted of POF (weft direction) and polyester fibers (PET; warp direction), interconnected in a so-called canvas pattern (Fig. 1, left scheme; POF in red, PET in light blue). Embroideries were either “Soutage” or “Schiffli” pattern. Soutage technique places the POF on one side of a woven PET substrate (warp and weft; canvas pattern) and holds them with local retention stitches in place (Fig. 1, middle scheme; retention stitches in dark blue). Schiffli technique (which allows retention stitches on both sides of a substrate) guides the POF on one side of a PET weave to the place of interest, crosses to the opposite side and back, which will lead to random loops due to POF twisting (Fig. 1, right scheme).

2.2 Woven specimens

The herein used weave was manufactured by Stabio Textil AG (Switzerland) from 250 µm PMMA POF (Mitsubishi Rayon, Japan) and white polyester (PET) fibers (Fig. 2). Six specimens were assembled for pulse and SpO2 measurements labeled from “A” to “F” in the following text (overview in Tab. 1).

 

Fig. 2. Woven specimens A to F made of 250 µm PMMA fibers (POF in weft direction, white textile PET fibers in warp direction). Two pictures are shown for every specimen (connected halogen lamp OFF and ON); specimen A and B are untreated and emit no light, therefore only one picture is displayed.

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Each contained 16 POF in weft direction, whereas warp threads consisted of PET fibers only. A was used as supplied (Fig. 2); B was identical to A, however two layers of woven fabric were superimposed (POF directions orthogonal to each other); C was cut with an optical fiber cutter and the fiber ends were left without further treatment; fiber surface of D was roughened over the length of 5 mm with POF polish paper (Harting, Germany; grain size 1000); E was identical to D, however a pressure-sensitive alumina foil reflector (3M, USA) was attached on the fiber back side; F was identical to C, however fiber ends were bent by 90 degree (radius 0.5–1.0 mm) towards the light source under local heating (125 °C, hot air gun). POF length, from connector to the point of irradiation or light emission, was 20 cm each. The fibers were glued with standard epoxy glue into F-SMA connectors (Precimation, Switzerland), and the fiber ends were polished later with fiber polishing/lapping film (aluminum oxide, grades 5, 3 and 1 µm; Thorlabs, USA).

 

Fig. 3. Embroidered specimens (G, upper row; H, lower row) made of 175 µm PMMA fibers; both with and without light source connected. The white PET substrate is visible (in warp and weft direction) as well as the threads of the retention stitches.

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2.3 Embroidered specimens

Due to the brittleness of PMMA all embroidered patterns were made from 175 µm PMMA POF (Poly-Optical, USA) as 250 µm fibers were very often breaking while being processed inside the textile machine due to the high acceleration forces. All embroidered patterns were manufactured by Bischoff Textil AG (Switzerland), for further technical information see [37]. Specimens assembled for pulse and SpO2 measurements are labeled from “G” to “I” in the following text (overview in Tab. 1): G was made using so called Soutage technique where one POF was bent in a radius of approximately 0.5 mm (Fig. 3, upper left and upper right side); H was manufactured using the Schiffli technique (Fig. 3, lower left and lower right side; the resulting loops had randomly distributed radii between 0.25 and 1 mm; approximately 3 fibers with the corresponding loops were irradiated at the same time in the following experiments); I was identical with H, however a pressure-sensitive back reflector of aluminum foil (3M, USA) was attached. POF length, from connector to the point of irradiation or light emission, was 20 cm each. The fibers were glued with standard epoxy glue into F-SMA connectors (Precimation, Switzerland), and the fiber ends were polished later with fiber polishing/lapping film (aluminum oxide, grades 5, 3 and 1 µm; Thorlabs, USA).

2.4 Glove manufacturing

One woven light emitter and one woven light detector were integrated into a standard cotton glove at the forefinger tip position. The light emitter consisted of 4 POF delivering light of 690 nm wavelength and 4 POF delivering 830 nm. The light detector consisted of 16 POF. Light detector and light emitter were manufactured according to specimen F (90 degree bends towards tissue). POF length, from connector to the point of irradiation or light emission, was 30 cm each. Again the fibers were glued with standard epoxy glue into F-SMA connectors and polished.

2.5 Efficiency of light in-coupling

Signal to noise ratio of the different specimens depends mainly on their light detecting sensitivity. The loss of light from the light source to the detector was expressed as light in-coupling efficiency (Eff) in [%]:

Eff=EnergyofdetectedlightfromtextileEnergyofemittedlightfromsource×100

 

Fig. 4. Measurement setup to determine Eff. Light is projected onto the tissue and the detected light intensity is measured. A similar setup was used when working with the halogen lamp (no lenses and pinhole were used in doing so, and the attached light guide was in direct contact with the textile).

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To measure Eff of woven and embroidered specimens two types of laboratory setups have been used (every specimen was measured five times in both setups). First setup consisted of a HeNe laser (1135P, 633 nm; JDS Uniphase, USA) with the textile specimen in a distance of 20 cm (Fig. 4). The laser beam diameter was widened by means of two lenses to 5.1 mm. The surface of the specimen was irradiated through a black silicone sheet placed on top of the fabric, having a 5 mm diameter hole. The light energy was measured with an Ulbricht integrating sphere (RW-3703-2; Gigahertz Optik, Germany). The second setup was using unfiltered light of a xenon halogen lamp equipped with a 5 mm diameter light guide (KL 2500 LCD; Schott, Germany). The light guide was placed directly on top of the specimen. The absolute energy and time dependent energy drift of either light source was determined with the formerly mentioned sphere (HeNe laser: 13.1±0.07 mW, drift<1% over 60 minutes; halogen lamp: 105.1±0.8 mW, drift 4.6% over 60 minutes; n=3).

2.6 Pulse waves

Pulse waves have been detected for all specimens using a near-infrared, non-invasive tissue oximeter (OxiplexTS; ISS, USA) on the tip of a subject’s forefinger (Fig. 5). Data was recorded for 20 seconds. Noise was calculated as standard deviation of residues resulting from a polynomial fit of 5 normalized consecutive heart beats. To irradiate the finger tips two silica optical fibers (400 µm silica fibers 3M; FT-400-EMT, from Thorlabs, USA) embedded in a silicone light seal/disc were used delivering light of 690 and 830 nm. Woven and embroidered specimens D, F, G and I were placed on the other side of the forefinger collecting the transmitted light. A black silicone sheet with a 5 mm diameter hole was placed between finger and textile to define the light receiving area. The fibers were glued with standard epoxy glue into F-SMA connectors (Precimation, Switzerland), and the fiber ends were polished later with fiber polishing/lapping film (aluminum oxide, grades 5, 3 and 1 µm; Thorlabs, USA; total POF length: 20 cm). F-SMA plugs were connected to the OxiplexTS detectors (sampling rate 50 Hz). Specimens G and H, respectively, were connected straight to the OxiplexTS (POF length for sender and detector 20 cm). Data has been exported as ASCII to Excel 2003 (Microsoft, USA) and Origin 8.0 (OriginLab, USA) for further processing.

 

Fig. 5. Setup to record pulse waves at forefinger tip. The OxiplexTS near infrared spectrophotometer includes laser diodes of 690 and 830 nm wavelength and a photomultiplier tube detector. Two fibers transport the light to illuminate the finger tissue. On the opposite side of the finger, the textile specimens A to I receive the transmitted light, which is detected by the photomultiplier tube. In the glove experiment, all fibers were incorporated inside a single textile such that the forefinger tip was positioned between illumination and detection.

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2.7 Arterial oxygen saturation SpO2

The natural logarithm of the light intensities at the detector was taken, which lead to the attenuations A690nm and A830nm. According to the modified Lambert-Beer law [61], the following system of equation was solved to obtain changes in O2Hb and HHb concentration:

ΔHHb×d×DPF=(-0.239ΔA690nm+0.099ΔA830nm)

ΔO2Hb×d×DPF=(+0.185Δ690nm-0.508ΔA830nm)

Where d is the distance between the illumination and detection and DPF the differential pathlength factor, which accounts for prolonged path of light in tissue due to multiple scattering. To obtain values of arterial blood [59] we take advantage of the pulsation of the blood, which is visible in Fig. 6. This pulsation is due to the change in blood concentration in tissue during heart beat with systole and diastole. This change is only present in arterial blood. Therefore, by calculating the amplitude of the pulsation, we obtain the ΔO2Hb×d×DPF and ΔHHb×d×DPF of the arterial blood. The amplitude was calculated by detrending (high pass filtering) the data and calculating the standard deviation, which is proportional to the amplitude. It is sufficient to have a value proportional to the amplitude since the SpO2 is calculated as a ratio and the proportionality factor as well as d and DPF cancel out:

SpO2[%]=Δ O2Hb×d×DPF/(ΔO2Hb×d×DPF+ΔHHb×d×DPF)

SpO2[%]=Δ O2Hb/(ΔO2Hb+ΔHHb)

Data was recorded for 20 seconds; only periods without movement artifacts were taken into account. Noise level was calculated over 5 seconds (50 data points/heart beat) after 5, 10 and 15 seconds.

3. Results and discussion

3.1 Light in-coupling efficiency

Most of the fiber optic sensors are oriented with their fiber ends perpendicularly to the object to be observed by reason of maximum signal sensitivity. Textile integrated POF however are in parallel to the examined object due to the manufacturing process, which is in general a two dimensional assignment (Fig. 1). Our first interest was, whether woven or embroidered specimens can be produced or altered after production in a way that light can couple into the fibers, and how Eff could be increased, respectively. For these measurements we directed a HeNe laser beam or a flexible light guide from a halogen lamp onto the textile specimen.

Tables Icon

Table 1. Light in-coupling efficiency Eff [%] of textile specimens (SD=standard deviation, n=5)

The results determined differed between laser and halogen lamp in some cases vastly which could be explained by the rather high heterogeneity of the textile specimens [37], which minimizes the potential accuracy of observation. The measured Eff are reported in Table 1.

Eff of a woven specimen without further altering of the fiber surface was very low (A, B). The weaving process is rather gentle to the optical fibers, so no sharp bends or cladding damaging is happening in general, which would lead to an improved geometry for light to enter and propagate inside the fibers. A much better approach seemed to be when the POF were cut at right angle at the location of interest (C); an increase in efficiency over A of a factor of 10–20 has been measured. Roughening of the fiber surface (D), which results mainly in removing the cladding material and generating an inhomogeneous surface with multiple in- and out-coupling locations, almost doubled the efficiency over just cutting the fiber end. Adding a rear light reflector to the same specimen facilitated increasing the amount of detected light by another factor of 2 (E). F, whose fiber ends were bent by 90 degree towards the irradiation source, showed the largest measurable efficiency (although due to the small bending radius a significant amount of light will be leaving the fiber directly again).

Embroidered specimens had a general lower Eff than the preferred woven specimen. G consisted of a single fiber with one bend (Soutage pattern), where light can be received. Compared to A (which consisted of 16 POF in parallel), the single bend did clearly increase Eff by a factor of approximately 2, even though the POF diameter is smaller (175 versus 250 µm). Changing the embroidery pattern from Soutage to Schiffli (H) and with the help of a rear alumina reflector (I), an additional increase of a factor of 2 could be measured.

3.2 Pulse wave measurements

To compare the sensitivity of woven versus embroidered specimens four fabrics haven been chosen for pulse wave detection on a human forefinger tip: D, F (woven) and G, I (embroidery). Specimen F delivered the highest amount of analog/digital counts (raw data displayed in Fig. 6); whereas specimen D had less than 35% thereof (valid for both wavelengths); this finding corresponds well to the previously measured Eff. It is also visible from the data that the used PMMA fibers have a rather high attenuation in the range of 830 nm, whereas 690 nm corresponds well to a local attenuation window of this material [6]. However, both fabrics allowed a precise determination of pulse waves.

For the embroidered specimen G and I more noise has been measured than for D and F, respectively (G: SD of residues after polynomial fit=±0.041 (690 nm), ±0.053 (830 nm); I: ±0.017, ±0.018; D: ±0.036, ±0.045; F: ±0.009, ±0.006), underlining the former finding in the light in-coupling efficiency section. Astonishingly, specimen G, having only one fiber bend, could be used to detect the changing absorbance of pulsating blood in the finger tip. However, noise level is high, and a precise detection of pulse waves will need further data analysis methods. The main reason for noise is the very low photon yield in the 830 nm window. A much better photon yield could be achieved with specimen I, about 4–5 times as much as with G, and about 50% of woven specimen F.

3.3 SpO2 measurements

Simultaneous pulse wave measurements at 690 and 830 nm have been used to calculate arterial oxygen saturation (SpO2; Fig. 6, green line) according to section 2.7. The noise level has been calculated at 94.14±0.84 % SpO2 (specimen D), 95.78±0.07 (F), 95.33±1.10 (G), and 94.86±0.57 (I) for a period of 5 seconds. These values are in agreement with standard pulse oximetry data [59]. However, raw data quality of specimen D and G is poor (changes in SpO2 up to 3% within 1 second) and a data smoothing algorithm (e.g. median filtering) for practical applications would be mandatory.

3.4 Artifacts of movements

To study movement artifacts we incorporated two POF emitters and one POF detector textile into a cotton glove (at the forefinger tip position). To simulate maximum deformation of the glove all five fingers were closed and opened at the same time and pulse waves have been recorded. The movement of the textile sensor against the underlying skin can be seen clearly in the data progression (Fig. 7). During the finger bending (opening and closing within 1 second), one to two pulses were not detectable, and positive or negative peaks of up to 8% SpO2 resulted therefore. Artifacts are mainly caused by the shift of blood within the tissue and the relocation of the sensor and detector fibers before and after the movement, i.e. different blood capillaries, bone structures, tissue scattering, and distance and finger thickness, are interrogated.

 

Fig. 6. Pulse waves and their calculated SpO2 of four specimens: weaves (D: upper left; F: upper right), embroideries (G: lower left; I: lower right). Time is displayed on the x-axis and analog/digital counts (ADC) at the detector on the y-axis. Blue lines correspond to 690 nm wavelength, red lines to 830 nm; calculated SpO2 is plotted in green. The amplifier setting at the detector was the same for each measurement. It is visible that a lower intensity (i.e. low ADC counts) leads to more noisy signals.

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4. Conclusions

In this report, we described an approach to design textile based pulse oximeters made of POF fabrics. They were used as light emitters and light detectors to human tissue. Three major textile manufacturing processes were compared in terms of signal yield and signal quality.

 

Fig. 7. Pulse waves and SpO2 of glove-type pulse oximeter. The displayed sequence represents closed→open→closed fingers.

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Woven specimens did not allow emitting or receiving light without further conditioning. Eff could be increased drastically when POF were altered (imperfections added to cladding, sharp bends, e.g.) and reliable pulse waves and arterial oxygen saturation level could be monitored. In practice, cutting, roughening or heating POF, which are incorporated inside a weave, is not a preferable process for industrial use, due to several reasons. Firstly, depending on the weaving process, the optical fibers are not at the surface of the fabric available for mechanical treatment; secondly, mechanical and thermal treatments will always affect the neighbor fibers as well, which will lead to unwanted fiber breaks and fabrics damage. For the same reasons, a chemical treatment of POF (partially dissolution of POF cladding and/or core materials) after weaving seems not to be a practical approach.

On the other hand, all specimens derived from embroidery obtained their light emitting and light receiving functionality during the textile manufacturing process; no after-treatment of the POF has been applied to the specimen reported herein. It could be demonstrated, that specimens with only one fiber bend did already allow pulse and SpO2 measurements, but the noise level was too high for precise SpO2 calculations. The signal to noise ratio depends on the number of detected photons and could be increased when more than just one POF was used and a reflector foil was attached and/or by a higher illumination intensity.

Thus, in our study we were able to show the feasibility of using photonic textiles for pulse oximetry. Our future work will be directed to further improvement of detection efficiency and the development of whole sensors based on photonic textiles.

Acknowledgements

The authors thank Andreas Stahl for his technical input and assistance of the experiments.

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39. A. Harlin, M. Mäkinen, and A. Vuorivirta, “Development of polymeric optical fibre fabrics as illumination elements and textile displays,” AUTEX Res. J. 3, 1–8 (2003).

40. http://www.lumalive.com

41. B. O’Connor, K. H. An, Y. Zhao, K. P. Pipe, and M. Shtein, “Fiber Shaped Light Emitting Device,” Adv. Mat. 19, 3897–3900 (2007). [CrossRef]  

42. S. S. Hardaker and R. V Gregory, “Progress toward dynamic color-responsive ‘chameleon’ fiber systems,” MRS Bull. 28, 564–567 (2003). [CrossRef]  

43. O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, “Surface-emitting fiber lasers,” Optics Express 14, 3929–3935 (2006). [CrossRef]   [PubMed]  

44. M. Mignanelli, K. Wani, J. Ballato, S. Foulger, and P. Brown, “Polymer microstructured fibers by one-step extrusion,” Optics Express 15, 6183–6189 (2007). [CrossRef]   [PubMed]  

45. A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, “Towards multimaterial multifunctional fibres that see, hear, sense and communicate,” Nature Materials 6, 336–347 (2007). [CrossRef]   [PubMed]  

46. R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, “Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease,” Scand. J. Med. Sci. Sports 11, 213–222 (2001). [CrossRef]   [PubMed]  

47. R. Boushel and C. A. Piantadosi, “Near-infrared spectroscopy for monitoring muscle oxygenation,” Acta. Physiol. Scand. 168, 615–622 (2000). [CrossRef]   [PubMed]  

48. H. L. Edmonds, Jr., B. L. Ganzel, and E. H. Austin, 3rd , “Cerebral oximetry for cardiac and vascular surgery,” Semin. Cardiothorac. Vasc. Anesth. 8, 147–166 (2004).

49. M. Ferrari, L. Mottola, and V. Quaresima, “Principles, techniques, and limitations of near infrared spectroscopy,” Can. J. Appl. Physiol. 29, 463–487 (2004). [CrossRef]   [PubMed]  

50. J. C. Hebden, “Advances in optical imaging of the newborn infant brain,” Psychophysiology 40, 501–510 (2003). [CrossRef]   [PubMed]  

51. Y. Hoshi, “Functional near-infrared spectroscopy: potential and limitations in neuroimaging studies,” Int. Rev. Neurobiol. 66, 237–266 (2005). [CrossRef]  

52. H. Obrig and A. Villringer, “Beyond the visible--imaging the human brain with light,” J. Cereb. Blood Flow Metab. 23, 1–18 (2003). [CrossRef]  

53. V. Quaresima, R. Lepanto, and M. Ferrari, “The use of near infrared spectroscopy in sports medicine,” J. Sports Med. Phys. Fitness 43, 1–13 (2003). [PubMed]  

54. D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, “Diffuse optical imaging of the healthy and diseased breast: A systematic review,” Breast Cancer Res. Treat. 108, 9–22 (2008). [CrossRef]  

55. J. D. Tobias, “Cerebral oxygenation monitoring: near-infrared spectroscopy,” Expert Rev. Med. Devices 3, 235–243 (2006). [CrossRef]   [PubMed]  

56. M. C. Taillefer and A. Y. Denault, “Cerebral near-infrared spectroscopy in adult heart surgery: systematic review of its clinical efficacy,” Can. J. Anaesth. 52, 79–87 (2005). [CrossRef]  

57. K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, “Near infrared spectroscopy for evaluation of the trauma patient: a technology review,” Resuscitation 68, 27–44 (2006). [CrossRef]  

58. M. Wolf, M. Ferrari, and V. Quaresima, “Progress of near infrared spectroscopy and imaging instrumentation for brain and muscle clinical applications,” J. Biomed. Opt. 12, 062104 (2007). [CrossRef]  

59. J. G. Webster, Design of Pulse Oximeters (IOP, Bristol, 1997). [CrossRef]  

60. A. Jubran, “Pulse Oximetry,” Crit. Care 3, R11–R17 (1999). [CrossRef]  

61. D. T. Delpy, M. Cope, P. van der Zee, S. Arridge, S. Wray, and J. Wyatt, “Estimation of optical pathlength through tissue from direct time of flight measurement,” Phys. Med. Biol. 33, 1433ߝ1442 (1988). [CrossRef]   [PubMed]  

References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  55. J. D. Tobias, "Cerebral oxygenation monitoring: near-infrared spectroscopy," Expert Rev. Med. Devices 3, 235-243 (2006).
    [CrossRef] [PubMed]
  56. M. C. Taillefer and A. Y. Denault, "Cerebral near-infrared spectroscopy in adult heart surgery: systematic review of its clinical efficacy," Can. J. Anaesth. 52, 79-87 (2005).
    [CrossRef]
  57. K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
    [CrossRef]
  58. M. Wolf, M. Ferrari, and V. Quaresima, "Progress of near infrared spectroscopy and imaging instrumentation for brain and muscle clinical applications," J. Biomed. Opt. 12,062104 (2007).
    [CrossRef]
  59. J. G. Webster, Design of Pulse Oximeters (IOP, Bristol, 1997).
    [CrossRef]
  60. A. Jubran, "Pulse Oximetry," Crit. Care 3, R11-R17 (1999).
    [CrossRef]
  61. D. T. Delpy, M. Cope, P. van der Zee, S. Arridge, S. Wray, and J. Wyatt, "Estimation of optical pathlength through tissue from direct time of flight measurement," Phys. Med. Biol. 33, 1433-1442 (1988).
    [CrossRef] [PubMed]

2008 (4)

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

A. Endruweit, A. C. Long, and M. S. Johnson, "Textile composites with integrated optical fibres: quantification of the influence of single and multiple fibre bends on the light transmission using a Monte Carlo ray-tracing method," Smart Mater. Struct. 17, 015004 (2008).
[CrossRef]

M. Rothmaier, M. P. Luong, and F. Clemens, "Textile Pressure Sensor Made of Flexible Plastic Optical Fibers," Sensors 8, 4318-4329 (2008).
[CrossRef]

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

2007 (7)

B. O'Connor, K. H. An, Y. Zhao, K. P. Pipe, and M. Shtein, "Fiber Shaped Light Emitting Device," Adv. Mat. 19, 3897-3900 (2007).
[CrossRef]

M. Wolf, M. Ferrari, and V. Quaresima, "Progress of near infrared spectroscopy and imaging instrumentation for brain and muscle clinical applications," J. Biomed. Opt. 12,062104 (2007).
[CrossRef]

B. Selm, M. Rothmaier, M. Camenzind, T. Khan, and H. Walt, "Novel flexible light diffuser and irradiation properties for photodynamic therapy," J. Biomed. Opt. 12, 034024 (2007).
[CrossRef] [PubMed]

M. Mignanelli, K. Wani, J. Ballato, S. Foulger, and P. Brown, "Polymer microstructured fibers by one-step extrusion," Optics Express 15, 6183-6189 (2007).
[CrossRef] [PubMed]

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

J. W. Zheng, Z. B. Zhang, T. H. Wu, and Y. Zhang, "A wearable mobihealth care system supporting real-time diagnosis and alarm," Med. Biol. Eng. Comput. 45, 877-885 (2007).
[CrossRef] [PubMed]

T. Allsop. K. Carroll, G. Lloyd, D. J. Webb, M. Miller, and I. Bennion, "Application of long-period-grating sensors to respiratory plethysmography," J. Biomed. Opt. 12, 064003 (2007).
[CrossRef]

2006 (9)

S. L. P. Tang and G. K. Stylios, "An overview of smart technologies for clothing design and engineering," Int. J. Clothing Sci. Technol. 18, 108-128 (2006).
[CrossRef]

C. N. Scanaill, S. Carew, P. Barralon, N. Noury, D. Lyons, and G. M. Lyons, "A review of approaches to mobility telemonitoring of the elderly in their living environment," Ann. Biomed. Eng. 34, 547-563 (2006).
[CrossRef]

J. Coosemans, B. Hermans, and R. Puers, "Integrating wireless ECG monitoring in textiles," Sens. Act. A - Phys. 130, 48-53 (2006).
[CrossRef]

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

J. S. Heo, J. H. Chung, and J. J. Lee, "Tactile sensor arrays using fiber Bragg grating sensors," Sens. Act.A-Phys. 126, 312-327 (2006).
[CrossRef]

A. Masuda, T. Murakami, K. Honda, and S. Yamaguchi, "Optical Properties of Woven Fabrics by Plastic Optical Fiber," J. Text. Eng. 52, 93-97 (2006).
[CrossRef]

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

J. D. Tobias, "Cerebral oxygenation monitoring: near-infrared spectroscopy," Expert Rev. Med. Devices 3, 235-243 (2006).
[CrossRef] [PubMed]

2005 (5)

M. C. Taillefer and A. Y. Denault, "Cerebral near-infrared spectroscopy in adult heart surgery: systematic review of its clinical efficacy," Can. J. Anaesth. 52, 79-87 (2005).
[CrossRef]

Y. Hoshi, "Functional near-infrared spectroscopy: potential and limitations in neuroimaging studies," Int. Rev. Neurobiol. 66, 237-266 (2005).
[CrossRef]

V. Koncar, "Optical fiber fabric displays," Opt. Photon. News 16, 40-44 (2005).
[CrossRef]

F. Carpi and D. De Rossi, "Electroactive polymer-based devices for e-textiles in biomedicine," IEEE Trans. Inf. Tech. Biomed. 9, 295-318 (2005).
[CrossRef]

A. Dhawan, T. K. Ghosh, and A. Seyam, "Fiber-Based Electrical and Optical Devices and Systems," Text. Progr. 36, 1-84 (2005).

2004 (4)

B. Yang, X. Tao, J. Yu, and H. Ho, "Compression Force Measured by Fiber Optic Smart Cellular Textile Composites," Text. Res. J. 74, 305-313 (2004).
[CrossRef]

S. Yuan, R. Huang, and Y. Rao, "Internal Strain Measurement in 3D Braided Composites Using Co-braided Optical Fiber Sensors," J. Mater. Sci. Technol. 20, 199-202 (2004).

H. L. Edmonds, Jr., B. L. Ganzel, and E. H. Austin, 3rd, "Cerebral oximetry for cardiac and vascular surgery," Semin. Cardiothorac. Vasc. Anesth. 8, 147-166 (2004).

M. Ferrari, L. Mottola, and V. Quaresima, "Principles, techniques, and limitations of near infrared spectroscopy," Can. J. Appl. Physiol. 29, 463-487 (2004).
[CrossRef] [PubMed]

2003 (6)

J. C. Hebden, "Advances in optical imaging of the newborn infant brain," Psychophysiology 40, 501-510 (2003).
[CrossRef] [PubMed]

S. S. Hardaker, and R. V. Gregory, "Progress toward dynamic color-responsive 'chameleon' fiber systems," MRS Bull. 28, 564-567 (2003).
[CrossRef]

H. Obrig and A. Villringer, "Beyond the visible--imaging the human brain with light," J. Cereb. Blood Flow Metab. 23, 1-18 (2003).
[CrossRef]

V. Quaresima, R. Lepanto, and M. Ferrari, "The use of near infrared spectroscopy in sports medicine," J. Sports Med. Phys. Fitness 43, 1-13 (2003).
[PubMed]

J. Schuster, M. Trahan, D. Heider, and W. Li, "Influence of fabric ties on the performance of woven-in optical fibres," Composites A 34, 855-861 (2003).
[CrossRef]

A. Harlin, M. Mäkinen, and A. Vuorivirta, "Development of polymeric optical fibre fabrics as illumination elements and textile displays," AUTEX Res. J. 3, 1-8 (2003).

2001 (2)

R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, "Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease," Scand. J. Med. Sci. Sports 11, 213-222 (2001).
[CrossRef] [PubMed]

J. Zubia and J. Arrue, "Plastic optical fibers: An introduction to their technological processes and applications," Opt. Fib. Technol. 7, 101-140 (2001).
[CrossRef]

2000 (6)

M. A. El-Sherif, J. M. Yuan, and A. MacDiarmid, "Fiber optic sensors and smart fabrics," J. Int. Mat. Sys. Struct. 11, 407-414 (2000).

X. M. Tao, "Integration of fibre-optic sensors in smart textile composites: Design and fabrication," J. Text. Inst. 91, 448-459 (2000).
[CrossRef]

E. R. Post, M. Orth, P. R. Gershenfeld, and N. Russo, "E-broidery�??Design and fabrication of textile-based computing," IBM Syst. J. 39,840-860 (2000).
[CrossRef]

M. El-Sherif, K. Fidanboylu, D. El-Sherif, R. Gafsi, J. Yuan, K. Richards, and K. C. Lee, "A novel fiber optic system for measuring the dynamic structural behavior of parachutes," J. Int. Mat. Sys. Struct. 11, 351-359 (2000).

R. Boushel and C. A. Piantadosi, "Near-infrared spectroscopy for monitoring muscle oxygenation," Acta. Physiol. Scand. 168, 615-622 (2000).
[CrossRef] [PubMed]

X. Tao, L. Tanga, W. Dua, and C. L. Choyb, "Internal strain measurement by fiber Bragg grating sensors in textile composites," Comp. Sci. Technol. 60, 657-669 (2000).
[CrossRef]

1999 (2)

C. Gopalsamy, S. Park, R. Rajamanickam, and S. Jayaraman, "The wearable motherboard: The first generation of adaptive and responsive textile structures (ARTS) for medical applications," J. Virtual Reality 4, 152-168 (1999).
[CrossRef]

A. Jubran, "Pulse Oximetry," Crit. Care 3, R11-R17 (1999).
[CrossRef]

1998 (1)

W. Du, X. M. Tao, H. Y. Tam, and C. L. Choy, "Fundamentals and applications of optical fiber Bragg grating sensors to textile structural composites," Composite Structures 42, 217-229 (1998).
[CrossRef]

1997 (1)

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

1995 (1)

J. W. Berthold, "Historical review of microbend fiber-optic sensors," J. Lightwave Technol. 13, 1193-1199 (1995).
[CrossRef]

1991 (1)

S. R. Emge, and C. L. Chen, "Two-dimensional contour imaging with a fiber optic microbend tactile sensor array," Sens. Act.B-Chem. 3, 31-42 (1991).
[CrossRef]

1989 (1)

D. T. Jenstrom, and C. L. Chen, "A fiber optic microbend tactile sensor array," Sens. Act. 20, 239-248 (1989).
[CrossRef]

1988 (1)

D. T. Delpy, M. Cope, P. van der Zee, S. Arridge, S. Wray, and J. Wyatt, "Estimation of optical pathlength through tissue from direct time of flight measurement," Phys. Med. Biol. 33, 1433-1442 (1988).
[CrossRef] [PubMed]

Abouraddy, A. F.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Allsop, T.

T. Allsop. K. Carroll, G. Lloyd, D. J. Webb, M. Miller, and I. Bennion, "Application of long-period-grating sensors to respiratory plethysmography," J. Biomed. Opt. 12, 064003 (2007).
[CrossRef]

An, K. H.

B. O'Connor, K. H. An, Y. Zhao, K. P. Pipe, and M. Shtein, "Fiber Shaped Light Emitting Device," Adv. Mat. 19, 3897-3900 (2007).
[CrossRef]

Arridge, S.

D. T. Delpy, M. Cope, P. van der Zee, S. Arridge, S. Wray, and J. Wyatt, "Estimation of optical pathlength through tissue from direct time of flight measurement," Phys. Med. Biol. 33, 1433-1442 (1988).
[CrossRef] [PubMed]

Arrue, J.

J. Zubia and J. Arrue, "Plastic optical fibers: An introduction to their technological processes and applications," Opt. Fib. Technol. 7, 101-140 (2001).
[CrossRef]

Askins, C. G.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

Athanasiou, T.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Austin, E. H.

H. L. Edmonds, Jr., B. L. Ganzel, and E. H. Austin, 3rd, "Cerebral oximetry for cardiac and vascular surgery," Semin. Cardiothorac. Vasc. Anesth. 8, 147-166 (2004).

Ballato, J.

M. Mignanelli, K. Wani, J. Ballato, S. Foulger, and P. Brown, "Polymer microstructured fibers by one-step extrusion," Optics Express 15, 6183-6189 (2007).
[CrossRef] [PubMed]

Barbee, R. W.

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

Barralon, P.

C. N. Scanaill, S. Carew, P. Barralon, N. Noury, D. Lyons, and G. M. Lyons, "A review of approaches to mobility telemonitoring of the elderly in their living environment," Ann. Biomed. Eng. 34, 547-563 (2006).
[CrossRef]

Bayindir, M.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

Benoit, G.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Berthold, J. W.

J. W. Berthold, "Historical review of microbend fiber-optic sensors," J. Lightwave Technol. 13, 1193-1199 (1995).
[CrossRef]

Boushel, R.

R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, "Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease," Scand. J. Med. Sci. Sports 11, 213-222 (2001).
[CrossRef] [PubMed]

R. Boushel and C. A. Piantadosi, "Near-infrared spectroscopy for monitoring muscle oxygenation," Acta. Physiol. Scand. 168, 615-622 (2000).
[CrossRef] [PubMed]

Brewster, M. M.

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Brown, P.

M. Mignanelli, K. Wani, J. Ballato, S. Foulger, and P. Brown, "Polymer microstructured fibers by one-step extrusion," Optics Express 15, 6183-6189 (2007).
[CrossRef] [PubMed]

Buchholz, J.

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

Bulow, J.

R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, "Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease," Scand. J. Med. Sci. Sports 11, 213-222 (2001).
[CrossRef] [PubMed]

Camenzind, M.

B. Selm, M. Rothmaier, M. Camenzind, T. Khan, and H. Walt, "Novel flexible light diffuser and irradiation properties for photodynamic therapy," J. Biomed. Opt. 12, 034024 (2007).
[CrossRef] [PubMed]

Carew, S.

C. N. Scanaill, S. Carew, P. Barralon, N. Noury, D. Lyons, and G. M. Lyons, "A review of approaches to mobility telemonitoring of the elderly in their living environment," Ann. Biomed. Eng. 34, 547-563 (2006).
[CrossRef]

Carpi, F.

F. Carpi and D. De Rossi, "Electroactive polymer-based devices for e-textiles in biomedicine," IEEE Trans. Inf. Tech. Biomed. 9, 295-318 (2005).
[CrossRef]

Chen, C. L.

S. R. Emge, and C. L. Chen, "Two-dimensional contour imaging with a fiber optic microbend tactile sensor array," Sens. Act.B-Chem. 3, 31-42 (1991).
[CrossRef]

D. T. Jenstrom, and C. L. Chen, "A fiber optic microbend tactile sensor array," Sens. Act. 20, 239-248 (1989).
[CrossRef]

Choy, C. L.

W. Du, X. M. Tao, H. Y. Tam, and C. L. Choy, "Fundamentals and applications of optical fiber Bragg grating sensors to textile structural composites," Composite Structures 42, 217-229 (1998).
[CrossRef]

Choyb, C. L.

X. Tao, L. Tanga, W. Dua, and C. L. Choyb, "Internal strain measurement by fiber Bragg grating sensors in textile composites," Comp. Sci. Technol. 60, 657-669 (2000).
[CrossRef]

Chung, J. H.

J. S. Heo, J. H. Chung, and J. J. Lee, "Tactile sensor arrays using fiber Bragg grating sensors," Sens. Act.A-Phys. 126, 312-327 (2006).
[CrossRef]

Clemens, F.

M. Rothmaier, M. P. Luong, and F. Clemens, "Textile Pressure Sensor Made of Flexible Plastic Optical Fibers," Sensors 8, 4318-4329 (2008).
[CrossRef]

Coosemans, J.

J. Coosemans, B. Hermans, and R. Puers, "Integrating wireless ECG monitoring in textiles," Sens. Act. A - Phys. 130, 48-53 (2006).
[CrossRef]

Cope, M.

D. T. Delpy, M. Cope, P. van der Zee, S. Arridge, S. Wray, and J. Wyatt, "Estimation of optical pathlength through tissue from direct time of flight measurement," Phys. Med. Biol. 33, 1433-1442 (1988).
[CrossRef] [PubMed]

Darzi, A.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Davis, M. A.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

De Rossi, D.

F. Carpi and D. De Rossi, "Electroactive polymer-based devices for e-textiles in biomedicine," IEEE Trans. Inf. Tech. Biomed. 9, 295-318 (2005).
[CrossRef]

Delpy, D. T.

D. T. Delpy, M. Cope, P. van der Zee, S. Arridge, S. Wray, and J. Wyatt, "Estimation of optical pathlength through tissue from direct time of flight measurement," Phys. Med. Biol. 33, 1433-1442 (1988).
[CrossRef] [PubMed]

Denault, A. Y.

M. C. Taillefer and A. Y. Denault, "Cerebral near-infrared spectroscopy in adult heart surgery: systematic review of its clinical efficacy," Can. J. Anaesth. 52, 79-87 (2005).
[CrossRef]

Depre, A.

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

Dhawan, A.

A. Dhawan, T. K. Ghosh, and A. Seyam, "Fiber-Based Electrical and Optical Devices and Systems," Text. Progr. 36, 1-84 (2005).

Du, W.

W. Du, X. M. Tao, H. Y. Tam, and C. L. Choy, "Fundamentals and applications of optical fiber Bragg grating sensors to textile structural composites," Composite Structures 42, 217-229 (1998).
[CrossRef]

Dua, W.

X. Tao, L. Tanga, W. Dua, and C. L. Choyb, "Internal strain measurement by fiber Bragg grating sensors in textile composites," Comp. Sci. Technol. 60, 657-669 (2000).
[CrossRef]

Edmonds, H. L.

H. L. Edmonds, Jr., B. L. Ganzel, and E. H. Austin, 3rd, "Cerebral oximetry for cardiac and vascular surgery," Semin. Cardiothorac. Vasc. Anesth. 8, 147-166 (2004).

El-Sherif, D.

M. El-Sherif, K. Fidanboylu, D. El-Sherif, R. Gafsi, J. Yuan, K. Richards, and K. C. Lee, "A novel fiber optic system for measuring the dynamic structural behavior of parachutes," J. Int. Mat. Sys. Struct. 11, 351-359 (2000).

El-Sherif, M.

M. El-Sherif, K. Fidanboylu, D. El-Sherif, R. Gafsi, J. Yuan, K. Richards, and K. C. Lee, "A novel fiber optic system for measuring the dynamic structural behavior of parachutes," J. Int. Mat. Sys. Struct. 11, 351-359 (2000).

El-Sherif, M. A.

M. A. El-Sherif, J. M. Yuan, and A. MacDiarmid, "Fiber optic sensors and smart fabrics," J. Int. Mat. Sys. Struct. 11, 407-414 (2000).

Emge, S. R.

S. R. Emge, and C. L. Chen, "Two-dimensional contour imaging with a fiber optic microbend tactile sensor array," Sens. Act.B-Chem. 3, 31-42 (1991).
[CrossRef]

Endruweit, A.

A. Endruweit, A. C. Long, and M. S. Johnson, "Textile composites with integrated optical fibres: quantification of the influence of single and multiple fibre bends on the light transmission using a Monte Carlo ray-tracing method," Smart Mater. Struct. 17, 015004 (2008).
[CrossRef]

Enfiel, L. C.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Ferrari, M.

M. Wolf, M. Ferrari, and V. Quaresima, "Progress of near infrared spectroscopy and imaging instrumentation for brain and muscle clinical applications," J. Biomed. Opt. 12,062104 (2007).
[CrossRef]

M. Ferrari, L. Mottola, and V. Quaresima, "Principles, techniques, and limitations of near infrared spectroscopy," Can. J. Appl. Physiol. 29, 463-487 (2004).
[CrossRef] [PubMed]

V. Quaresima, R. Lepanto, and M. Ferrari, "The use of near infrared spectroscopy in sports medicine," J. Sports Med. Phys. Fitness 43, 1-13 (2003).
[PubMed]

Fidanboylu, K.

M. El-Sherif, K. Fidanboylu, D. El-Sherif, R. Gafsi, J. Yuan, K. Richards, and K. C. Lee, "A novel fiber optic system for measuring the dynamic structural behavior of parachutes," J. Int. Mat. Sys. Struct. 11, 351-359 (2000).

Filho, I. P.

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

Fink, Y.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Foulger, S.

M. Mignanelli, K. Wani, J. Ballato, S. Foulger, and P. Brown, "Polymer microstructured fibers by one-step extrusion," Optics Express 15, 6183-6189 (2007).
[CrossRef] [PubMed]

Friebele, E. J.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

Gafsi, R.

M. El-Sherif, K. Fidanboylu, D. El-Sherif, R. Gafsi, J. Yuan, K. Richards, and K. C. Lee, "A novel fiber optic system for measuring the dynamic structural behavior of parachutes," J. Int. Mat. Sys. Struct. 11, 351-359 (2000).

Ganzel, B. L.

H. L. Edmonds, Jr., B. L. Ganzel, and E. H. Austin, 3rd, "Cerebral oximetry for cardiac and vascular surgery," Semin. Cardiothorac. Vasc. Anesth. 8, 147-166 (2004).

Gershenfeld, P. R.

E. R. Post, M. Orth, P. R. Gershenfeld, and N. Russo, "E-broidery�??Design and fabrication of textile-based computing," IBM Syst. J. 39,840-860 (2000).
[CrossRef]

Ghosh, T. K.

A. Dhawan, T. K. Ghosh, and A. Seyam, "Fiber-Based Electrical and Optical Devices and Systems," Text. Progr. 36, 1-84 (2005).

Gibson, A.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Gonzales-Alonzo, J.

R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, "Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease," Scand. J. Med. Sci. Sports 11, 213-222 (2001).
[CrossRef] [PubMed]

Gopalsamy, C.

C. Gopalsamy, S. Park, R. Rajamanickam, and S. Jayaraman, "The wearable motherboard: The first generation of adaptive and responsive textile structures (ARTS) for medical applications," J. Virtual Reality 4, 152-168 (1999).
[CrossRef]

Gregory, R. V.

S. S. Hardaker, and R. V. Gregory, "Progress toward dynamic color-responsive 'chameleon' fiber systems," MRS Bull. 28, 564-567 (2003).
[CrossRef]

Grillet, A.

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

Hardaker, S. S.

S. S. Hardaker, and R. V. Gregory, "Progress toward dynamic color-responsive 'chameleon' fiber systems," MRS Bull. 28, 564-567 (2003).
[CrossRef]

Harlin, A.

A. Harlin, M. Mäkinen, and A. Vuorivirta, "Development of polymeric optical fibre fabrics as illumination elements and textile displays," AUTEX Res. J. 3, 1-8 (2003).

Hart, S. D.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

Hebden, J.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Hebden, J. C.

J. C. Hebden, "Advances in optical imaging of the newborn infant brain," Psychophysiology 40, 501-510 (2003).
[CrossRef] [PubMed]

Heider, D.

J. Schuster, M. Trahan, D. Heider, and W. Li, "Influence of fabric ties on the performance of woven-in optical fibres," Composites A 34, 855-861 (2003).
[CrossRef]

Heo, J. S.

J. S. Heo, J. H. Chung, and J. J. Lee, "Tactile sensor arrays using fiber Bragg grating sensors," Sens. Act.A-Phys. 126, 312-327 (2006).
[CrossRef]

Hermans, B.

J. Coosemans, B. Hermans, and R. Puers, "Integrating wireless ECG monitoring in textiles," Sens. Act. A - Phys. 130, 48-53 (2006).
[CrossRef]

Ho, H.

B. Yang, X. Tao, J. Yu, and H. Ho, "Compression Force Measured by Fiber Optic Smart Cellular Textile Composites," Text. Res. J. 74, 305-313 (2004).
[CrossRef]

Honda, K.

A. Masuda, T. Murakami, K. Honda, and S. Yamaguchi, "Optical Properties of Woven Fabrics by Plastic Optical Fiber," J. Text. Eng. 52, 93-97 (2006).
[CrossRef]

Hoshi, Y.

Y. Hoshi, "Functional near-infrared spectroscopy: potential and limitations in neuroimaging studies," Int. Rev. Neurobiol. 66, 237-266 (2005).
[CrossRef]

Huang, R.

S. Yuan, R. Huang, and Y. Rao, "Internal Strain Measurement in 3D Braided Composites Using Co-braided Optical Fiber Sensors," J. Mater. Sci. Technol. 20, 199-202 (2004).

Ibanescu, M.

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Ivatury, R. R.

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

Jayaraman, S.

C. Gopalsamy, S. Park, R. Rajamanickam, and S. Jayaraman, "The wearable motherboard: The first generation of adaptive and responsive textile structures (ARTS) for medical applications," J. Virtual Reality 4, 152-168 (1999).
[CrossRef]

Jenstrom, D. T.

D. T. Jenstrom, and C. L. Chen, "A fiber optic microbend tactile sensor array," Sens. Act. 20, 239-248 (1989).
[CrossRef]

Joannopoulos, J. D.

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Johnson, M. S.

A. Endruweit, A. C. Long, and M. S. Johnson, "Textile composites with integrated optical fibres: quantification of the influence of single and multiple fibre bends on the light transmission using a Monte Carlo ray-tracing method," Smart Mater. Struct. 17, 015004 (2008).
[CrossRef]

Jubran, A.

A. Jubran, "Pulse Oximetry," Crit. Care 3, R11-R17 (1999).
[CrossRef]

Kaser-Hotz, B.

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

Kersey, A. D.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

Khan, T.

B. Selm, M. Rothmaier, M. Camenzind, T. Khan, and H. Walt, "Novel flexible light diffuser and irradiation properties for photodynamic therapy," J. Biomed. Opt. 12, 034024 (2007).
[CrossRef] [PubMed]

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

Kinet, D.

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

Kjaer, M.

R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, "Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease," Scand. J. Med. Sci. Sports 11, 213-222 (2001).
[CrossRef] [PubMed]

Koncar, V.

V. Koncar, "Optical fiber fabric displays," Opt. Photon. News 16, 40-44 (2005).
[CrossRef]

Koo, K. P.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

Krebber, K.

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

Kuriki, K.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Langberg, H.

R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, "Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease," Scand. J. Med. Sci. Sports 11, 213-222 (2001).
[CrossRef] [PubMed]

LeBlanc, M.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

Lee, J. J.

J. S. Heo, J. H. Chung, and J. J. Lee, "Tactile sensor arrays using fiber Bragg grating sensors," Sens. Act.A-Phys. 126, 312-327 (2006).
[CrossRef]

Lee, K. C.

M. El-Sherif, K. Fidanboylu, D. El-Sherif, R. Gafsi, J. Yuan, K. Richards, and K. C. Lee, "A novel fiber optic system for measuring the dynamic structural behavior of parachutes," J. Int. Mat. Sys. Struct. 11, 351-359 (2000).

Leff, D. R.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Lepanto, R.

V. Quaresima, R. Lepanto, and M. Ferrari, "The use of near infrared spectroscopy in sports medicine," J. Sports Med. Phys. Fitness 43, 1-13 (2003).
[PubMed]

Li, W.

J. Schuster, M. Trahan, D. Heider, and W. Li, "Influence of fabric ties on the performance of woven-in optical fibres," Composites A 34, 855-861 (2003).
[CrossRef]

Long, A. C.

A. Endruweit, A. C. Long, and M. S. Johnson, "Textile composites with integrated optical fibres: quantification of the influence of single and multiple fibre bends on the light transmission using a Monte Carlo ray-tracing method," Smart Mater. Struct. 17, 015004 (2008).
[CrossRef]

Luong, M. P.

M. Rothmaier, M. P. Luong, and F. Clemens, "Textile Pressure Sensor Made of Flexible Plastic Optical Fibers," Sensors 8, 4318-4329 (2008).
[CrossRef]

Lyons, D.

C. N. Scanaill, S. Carew, P. Barralon, N. Noury, D. Lyons, and G. M. Lyons, "A review of approaches to mobility telemonitoring of the elderly in their living environment," Ann. Biomed. Eng. 34, 547-563 (2006).
[CrossRef]

Lyons, G. M.

C. N. Scanaill, S. Carew, P. Barralon, N. Noury, D. Lyons, and G. M. Lyons, "A review of approaches to mobility telemonitoring of the elderly in their living environment," Ann. Biomed. Eng. 34, 547-563 (2006).
[CrossRef]

MacDiarmid, A.

M. A. El-Sherif, J. M. Yuan, and A. MacDiarmid, "Fiber optic sensors and smart fabrics," J. Int. Mat. Sys. Struct. 11, 407-414 (2000).

Mäkinen, M.

A. Harlin, M. Mäkinen, and A. Vuorivirta, "Development of polymeric optical fibre fabrics as illumination elements and textile displays," AUTEX Res. J. 3, 1-8 (2003).

Masuda, A.

A. Masuda, T. Murakami, K. Honda, and S. Yamaguchi, "Optical Properties of Woven Fabrics by Plastic Optical Fiber," J. Text. Eng. 52, 93-97 (2006).
[CrossRef]

Mignanelli, M.

M. Mignanelli, K. Wani, J. Ballato, S. Foulger, and P. Brown, "Polymer microstructured fibers by one-step extrusion," Optics Express 15, 6183-6189 (2007).
[CrossRef] [PubMed]

Mottola, L.

M. Ferrari, L. Mottola, and V. Quaresima, "Principles, techniques, and limitations of near infrared spectroscopy," Can. J. Appl. Physiol. 29, 463-487 (2004).
[CrossRef] [PubMed]

Murakami, T.

A. Masuda, T. Murakami, K. Honda, and S. Yamaguchi, "Optical Properties of Woven Fabrics by Plastic Optical Fiber," J. Text. Eng. 52, 93-97 (2006).
[CrossRef]

Noury, N.

C. N. Scanaill, S. Carew, P. Barralon, N. Noury, D. Lyons, and G. M. Lyons, "A review of approaches to mobility telemonitoring of the elderly in their living environment," Ann. Biomed. Eng. 34, 547-563 (2006).
[CrossRef]

Obrig, H.

H. Obrig and A. Villringer, "Beyond the visible--imaging the human brain with light," J. Cereb. Blood Flow Metab. 23, 1-18 (2003).
[CrossRef]

O'Connor, B.

B. O'Connor, K. H. An, Y. Zhao, K. P. Pipe, and M. Shtein, "Fiber Shaped Light Emitting Device," Adv. Mat. 19, 3897-3900 (2007).
[CrossRef]

Olesen, J.

R. Boushel, H. Langberg, J. Olesen, J. Gonzales-Alonzo, J. Bulow, and M. Kjaer, "Monitoring tissue oxygen availability with near infrared spectroscopy (NIRS) in health and disease," Scand. J. Med. Sci. Sports 11, 213-222 (2001).
[CrossRef] [PubMed]

Orf, N.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

Orf, N. D.

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Orth, M.

E. R. Post, M. Orth, P. R. Gershenfeld, and N. Russo, "E-broidery�??Design and fabrication of textile-based computing," IBM Syst. J. 39,840-860 (2000).
[CrossRef]

Park, S.

C. Gopalsamy, S. Park, R. Rajamanickam, and S. Jayaraman, "The wearable motherboard: The first generation of adaptive and responsive textile structures (ARTS) for medical applications," J. Virtual Reality 4, 152-168 (1999).
[CrossRef]

Patrick, H. J.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

Patten, D. K.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Piantadosi, C. A.

R. Boushel and C. A. Piantadosi, "Near-infrared spectroscopy for monitoring muscle oxygenation," Acta. Physiol. Scand. 168, 615-622 (2000).
[CrossRef] [PubMed]

Pipe, K. P.

B. O'Connor, K. H. An, Y. Zhao, K. P. Pipe, and M. Shtein, "Fiber Shaped Light Emitting Device," Adv. Mat. 19, 3897-3900 (2007).
[CrossRef]

Pirotte, F.

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

Pittman, R.

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

Post, E. R.

E. R. Post, M. Orth, P. R. Gershenfeld, and N. Russo, "E-broidery�??Design and fabrication of textile-based computing," IBM Syst. J. 39,840-860 (2000).
[CrossRef]

Puers, R.

J. Coosemans, B. Hermans, and R. Puers, "Integrating wireless ECG monitoring in textiles," Sens. Act. A - Phys. 130, 48-53 (2006).
[CrossRef]

Putnam, M. A.

A. D. Kersey, M. A. Davis, H. J. Patrick, M. LeBlanc, K. P. Koo, C. G. Askins, M. A. Putnam, and E. J. Friebele, "Fiber grating sensors," J. Lightwave Technol. 15, 1442-1463 (1997).
[CrossRef]

Quaresima, V.

M. Wolf, M. Ferrari, and V. Quaresima, "Progress of near infrared spectroscopy and imaging instrumentation for brain and muscle clinical applications," J. Biomed. Opt. 12,062104 (2007).
[CrossRef]

M. Ferrari, L. Mottola, and V. Quaresima, "Principles, techniques, and limitations of near infrared spectroscopy," Can. J. Appl. Physiol. 29, 463-487 (2004).
[CrossRef] [PubMed]

V. Quaresima, R. Lepanto, and M. Ferrari, "The use of near infrared spectroscopy in sports medicine," J. Sports Med. Phys. Fitness 43, 1-13 (2003).
[PubMed]

Rajamanickam, R.

C. Gopalsamy, S. Park, R. Rajamanickam, and S. Jayaraman, "The wearable motherboard: The first generation of adaptive and responsive textile structures (ARTS) for medical applications," J. Virtual Reality 4, 152-168 (1999).
[CrossRef]

Rao, Y.

S. Yuan, R. Huang, and Y. Rao, "Internal Strain Measurement in 3D Braided Composites Using Co-braided Optical Fiber Sensors," J. Mater. Sci. Technol. 20, 199-202 (2004).

Richards, K.

M. El-Sherif, K. Fidanboylu, D. El-Sherif, R. Gafsi, J. Yuan, K. Richards, and K. C. Lee, "A novel fiber optic system for measuring the dynamic structural behavior of parachutes," J. Int. Mat. Sys. Struct. 11, 351-359 (2000).

Rodriguez, A.

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Rothmaier, M.

M. Rothmaier, M. P. Luong, and F. Clemens, "Textile Pressure Sensor Made of Flexible Plastic Optical Fibers," Sensors 8, 4318-4329 (2008).
[CrossRef]

B. Selm, M. Rothmaier, M. Camenzind, T. Khan, and H. Walt, "Novel flexible light diffuser and irradiation properties for photodynamic therapy," J. Biomed. Opt. 12, 034024 (2007).
[CrossRef] [PubMed]

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

Russo, N.

E. R. Post, M. Orth, P. R. Gershenfeld, and N. Russo, "E-broidery�??Design and fabrication of textile-based computing," IBM Syst. J. 39,840-860 (2000).
[CrossRef]

Scanaill, C. N.

C. N. Scanaill, S. Carew, P. Barralon, N. Noury, D. Lyons, and G. M. Lyons, "A review of approaches to mobility telemonitoring of the elderly in their living environment," Ann. Biomed. Eng. 34, 547-563 (2006).
[CrossRef]

Schukar, M.

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

Schuster, J.

J. Schuster, M. Trahan, D. Heider, and W. Li, "Influence of fabric ties on the performance of woven-in optical fibres," Composites A 34, 855-861 (2003).
[CrossRef]

Selm, B.

B. Selm, M. Rothmaier, M. Camenzind, T. Khan, and H. Walt, "Novel flexible light diffuser and irradiation properties for photodynamic therapy," J. Biomed. Opt. 12, 034024 (2007).
[CrossRef] [PubMed]

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

Seyam, A.

A. Dhawan, T. K. Ghosh, and A. Seyam, "Fiber-Based Electrical and Optical Devices and Systems," Text. Progr. 36, 1-84 (2005).

Shapira, O.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Shtein, M.

B. O'Connor, K. H. An, Y. Zhao, K. P. Pipe, and M. Shtein, "Fiber Shaped Light Emitting Device," Adv. Mat. 19, 3897-3900 (2007).
[CrossRef]

Sorin, F.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

Spiess, B.

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

Stylios, G. K.

S. L. P. Tang and G. K. Stylios, "An overview of smart technologies for clothing design and engineering," Int. J. Clothing Sci. Technol. 18, 108-128 (2006).
[CrossRef]

Taillefer, M. C.

M. C. Taillefer and A. Y. Denault, "Cerebral near-infrared spectroscopy in adult heart surgery: systematic review of its clinical efficacy," Can. J. Anaesth. 52, 79-87 (2005).
[CrossRef]

Tam, H. Y.

W. Du, X. M. Tao, H. Y. Tam, and C. L. Choy, "Fundamentals and applications of optical fiber Bragg grating sensors to textile structural composites," Composite Structures 42, 217-229 (1998).
[CrossRef]

Tang, S. L. P.

S. L. P. Tang and G. K. Stylios, "An overview of smart technologies for clothing design and engineering," Int. J. Clothing Sci. Technol. 18, 108-128 (2006).
[CrossRef]

Tanga, L.

X. Tao, L. Tanga, W. Dua, and C. L. Choyb, "Internal strain measurement by fiber Bragg grating sensors in textile composites," Comp. Sci. Technol. 60, 657-669 (2000).
[CrossRef]

Tao, X.

B. Yang, X. Tao, J. Yu, and H. Ho, "Compression Force Measured by Fiber Optic Smart Cellular Textile Composites," Text. Res. J. 74, 305-313 (2004).
[CrossRef]

X. Tao, L. Tanga, W. Dua, and C. L. Choyb, "Internal strain measurement by fiber Bragg grating sensors in textile composites," Comp. Sci. Technol. 60, 657-669 (2000).
[CrossRef]

Tao, X. M.

X. M. Tao, "Integration of fibre-optic sensors in smart textile composites: Design and fabrication," J. Text. Inst. 91, 448-459 (2000).
[CrossRef]

W. Du, X. M. Tao, H. Y. Tam, and C. L. Choy, "Fundamentals and applications of optical fiber Bragg grating sensors to textile structural composites," Composite Structures 42, 217-229 (1998).
[CrossRef]

Temelkuran, B.

A. F. Abouraddy, M. Bayindir, G. Benoit, S. D. Hart, K. Kuriki, N. Orf, O. Shapira, F. Sorin, B. Temelkuran, and Y. Fink, "Towards multimaterial multifunctional fibres that see, hear, sense and communicate," Nature Materials 6, 336-347 (2007).
[CrossRef] [PubMed]

Terner, J.

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

Tobias, J. D.

J. D. Tobias, "Cerebral oxygenation monitoring: near-infrared spectroscopy," Expert Rev. Med. Devices 3, 235-243 (2006).
[CrossRef] [PubMed]

Trahan, M.

J. Schuster, M. Trahan, D. Heider, and W. Li, "Influence of fabric ties on the performance of woven-in optical fibres," Composites A 34, 855-861 (2003).
[CrossRef]

Unternährer, M.

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

van der Zee, P.

D. T. Delpy, M. Cope, P. van der Zee, S. Arridge, S. Wray, and J. Wyatt, "Estimation of optical pathlength through tissue from direct time of flight measurement," Phys. Med. Biol. 33, 1433-1442 (1988).
[CrossRef] [PubMed]

Viens, J. F.

O. Shapira, K. Kuriki, N. D. Orf, A. F. Abouraddy, G. Benoit, J. F. Viens, A. Rodriguez, M. Ibanescu, J. D. Joannopoulos, Y. Fink, and M. M. Brewster, "Surface-emitting fiber lasers," Optics Express 14, 3929-3935 (2006).
[CrossRef] [PubMed]

Villringer, A.

H. Obrig and A. Villringer, "Beyond the visible--imaging the human brain with light," J. Cereb. Blood Flow Metab. 23, 1-18 (2003).
[CrossRef]

Vuorivirta, A.

A. Harlin, M. Mäkinen, and A. Vuorivirta, "Development of polymeric optical fibre fabrics as illumination elements and textile displays," AUTEX Res. J. 3, 1-8 (2003).

Walt, H.

B. Selm, M. Rothmaier, M. Camenzind, T. Khan, and H. Walt, "Novel flexible light diffuser and irradiation properties for photodynamic therapy," J. Biomed. Opt. 12, 034024 (2007).
[CrossRef] [PubMed]

T. Khan, M. Unternährer, J. Buchholz, B. Kaser-Hotz, B. Selm, M. Rothmaier, and H. Walt, "Performance of a contact textile-based light diffuser for photodynamic therapy," Photodiagnosis and Photodynamic Therapy 3, 51-60 (2006).
[CrossRef]

Wani, K.

M. Mignanelli, K. Wani, J. Ballato, S. Foulger, and P. Brown, "Polymer microstructured fibers by one-step extrusion," Optics Express 15, 6183-6189 (2007).
[CrossRef] [PubMed]

Ward, K. R.

K. R. Ward, R. R. Ivatury, R. W. Barbee, J. Terner, R. Pittman, I. P. Filho, and B. Spiess, "Near infrared spectroscopy for evaluation of the trauma patient: a technology review," Resuscitation 68, 27-44 (2006).
[CrossRef]

Warren, O. J.

D. R. Leff, O. J. Warren, L. C. Enfiel, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, "Diffuse optical imaging of the healthy and diseased breast: A systematic review," Breast Cancer Res. Treat. 108,9-22 (2008).
[CrossRef]

Witt, J.

A. Grillet, D. Kinet, J. Witt, M. Schukar, K. Krebber, F. Pirotte, and A. Depre, "Optical Fiber Sensors Embedded Into Medical Textiles for Healthcare Monitoring," IEEE Sensors J. 8, 1215-1222 (2008).
[CrossRef]

Wolf, M.

M. Wolf, M. Ferrari, and V. Quaresima, "Progress of near infrared spectroscopy and imaging instrumentation for brain and muscle clinical applications," J. Biomed. Opt. 12,062104 (2007).
[CrossRef]

Wray, S.

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S. Yuan, R. Huang, and Y. Rao, "Internal Strain Measurement in 3D Braided Composites Using Co-braided Optical Fiber Sensors," J. Mater. Sci. Technol. 20, 199-202 (2004).

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M. A. El-Sherif, J. M. Yuan, and A. MacDiarmid, "Fiber optic sensors and smart fabrics," J. Int. Mat. Sys. Struct. 11, 407-414 (2000).

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Figures (7)

Fig. 1.
Fig. 1.

Textile techniques used, POF (red), PET fibers (light blue). Left scheme: canvas pattern weaving of POF and PET fibers; middle scheme: Soutage embroidery (PET substrate in light blue, retention stitches in dark blue); right scheme: Schiffli embroidery. Both embroideries are using a canvas type PET weave as substrate.

Fig. 2.
Fig. 2.

Woven specimens A to F made of 250 µm PMMA fibers (POF in weft direction, white textile PET fibers in warp direction). Two pictures are shown for every specimen (connected halogen lamp OFF and ON); specimen A and B are untreated and emit no light, therefore only one picture is displayed.

Fig. 3.
Fig. 3.

Embroidered specimens (G, upper row; H, lower row) made of 175 µm PMMA fibers; both with and without light source connected. The white PET substrate is visible (in warp and weft direction) as well as the threads of the retention stitches.

Fig. 4.
Fig. 4.

Measurement setup to determine Eff . Light is projected onto the tissue and the detected light intensity is measured. A similar setup was used when working with the halogen lamp (no lenses and pinhole were used in doing so, and the attached light guide was in direct contact with the textile).

Fig. 5.
Fig. 5.

Setup to record pulse waves at forefinger tip. The OxiplexTS near infrared spectrophotometer includes laser diodes of 690 and 830 nm wavelength and a photomultiplier tube detector. Two fibers transport the light to illuminate the finger tissue. On the opposite side of the finger, the textile specimens A to I receive the transmitted light, which is detected by the photomultiplier tube. In the glove experiment, all fibers were incorporated inside a single textile such that the forefinger tip was positioned between illumination and detection.

Fig. 6.
Fig. 6.

Pulse waves and their calculated SpO2 of four specimens: weaves (D: upper left; F: upper right), embroideries (G: lower left; I: lower right). Time is displayed on the x-axis and analog/digital counts (ADC) at the detector on the y-axis. Blue lines correspond to 690 nm wavelength, red lines to 830 nm; calculated SpO2 is plotted in green. The amplifier setting at the detector was the same for each measurement. It is visible that a lower intensity (i.e. low ADC counts) leads to more noisy signals.

Fig. 7.
Fig. 7.

Pulse waves and SpO2 of glove-type pulse oximeter. The displayed sequence represents closed→open→closed fingers.

Tables (1)

Tables Icon

Table 1. Light in-coupling efficiency Eff [%] of textile specimens (SD=standard deviation, n=5)

Metrics