Abstract

To improve the spatial resolution in near-infrared-ray computed tomography (NIR-CT), a first-generation scanner in the first-living-body window was constructed. The NIR photons are produced from an 850 nm laser module, and penetrating photons from an object are detected using a photodiode (PD). To improve the spatial resolution, we used a 1.0-mm-diam graphite pinhole and a 1.0-mm-diam 5.0-mm-length graphite collimator. To detect the penetrating photons, the pinhole is set behind the object, and the collimator is attached to the PD to improve the spatial resolution. The NIR-CT is accomplished by repeated translations and rotations of the object. The translation is performed by the object moving between the laser and the PD modules. The translation and rotation steps were 0.25 mm and 1.0º, respectively, and the spatial resolutions were determined as 1.0×1.0 mm2. The scanning time and the total rotation angle for CT were 9.8 min and 180º, respectively.

© 2019 SPIE/OSA

PDF Article
More Like This
Measurement of human-body-window spectra using a white power light-emitting diode and its application to high-spatial-resolution computed tomography

Hodaka Moriyama, Eiichi Sato, Yasuyuki Oda, Sohei Yoshida, Osahiko Hagiwara, Toshiyuki Enomoto, and Manabu Watanabe
11073_74 European Conference on Biomedical Optics (ECBO) 2019

Utilization of 850 nm Near-infrared VCSEL for High-capacity Indoor Free Space Optical Communications

Zixian Wei, Mingyue Guan, Zihan Zang, and H. Y. Fu
Su1D.1 Asia Communications and Photonics Conference (ACPC) 2018

Single Sensor Based High Resolution System for Functional Near-Infrared Spectroscopy

M. Atif Yaqub, Usman Ghafoor, and Keum-Shik Hong
JTh2A.18 Optical Sensors (Sensors) 2019

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription