Abstract

With an ultrafast time-gated optical detection method, a thin translucent strip of fat (2.5 mm thick) hidden inside a 4-cm-thick tissue is located with millimeter spatial resolution.

© 1993 Optical Society of America

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References

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1992

1991

1990

1988

G. A. Navarro, A. E. Proflo, Med. Phys. 15, 181 (1988).
[CrossRef] [PubMed]

1987

E. A. Sickles, Recent Results Cancer Res. 105, 31(1987).
[CrossRef] [PubMed]

1986

R. Lafrenuere, F. S. Ashkar, A. S. Ketcham, Am. Surg. 52, 123 (1986).

1983

D. J. Watmough, Radiology 147, 89 (1983).
[PubMed]

Alfano, R. R.

Anderson-Engels, S.

Ashkar, F. S.

R. Lafrenuere, F. S. Ashkar, A. S. Ketcham, Am. Surg. 52, 123 (1986).

Berg, R.

Chen, C.

Chen, H.

Chen, Y.

Das, B. B.

Dilworth, D.

Duncan, M. D.

Hebden, J. C.

Ho, P. P.

L. Wang, P. P. Ho, C. Liu, G. Zhang, R. R. Alfano, Science 253, 769 (1991).
[CrossRef] [PubMed]

Jarlman, O.

Ketcham, A. S.

R. Lafrenuere, F. S. Ashkar, A. S. Ketcham, Am. Surg. 52, 123 (1986).

Kruger, R. A.

Lafrenuere, R.

R. Lafrenuere, F. S. Ashkar, A. S. Ketcham, Am. Surg. 52, 123 (1986).

Leith, E.

Leith, E. N.

Liu, C.

L. Wang, P. P. Ho, C. Liu, G. Zhang, R. R. Alfano, Science 253, 769 (1991).
[CrossRef] [PubMed]

Liu, F.

F. Liu, K. M. Yoo, R. R. Alfano, Opt. Lett. 16, 351(1991).
[CrossRef] [PubMed]

K. M. Yoo, F. Liu, R. R. Alfano, Phys. Rev. Lett. 64, 2647 (1990).
[CrossRef] [PubMed]

Lopez, J.

Mahon, R.

Navarro, G. A.

G. A. Navarro, A. E. Proflo, Med. Phys. 15, 181 (1988).
[CrossRef] [PubMed]

Proflo, A. E.

G. A. Navarro, A. E. Proflo, Med. Phys. 15, 181 (1988).
[CrossRef] [PubMed]

Reintjes, J.

Sickles, E. A.

E. A. Sickles, Recent Results Cancer Res. 105, 31(1987).
[CrossRef] [PubMed]

Sun, P. C.

Svanberg, S.

Tankersley, L. L.

Valdmanis, J.

Wang, L.

L. Wang, P. P. Ho, C. Liu, G. Zhang, R. R. Alfano, Science 253, 769 (1991).
[CrossRef] [PubMed]

Watmough, D. J.

D. J. Watmough, Radiology 147, 89 (1983).
[PubMed]

Wong, K. S.

Xing, Q.

Yoo, K. M.

Zhang, G.

L. Wang, P. P. Ho, C. Liu, G. Zhang, R. R. Alfano, Science 253, 769 (1991).
[CrossRef] [PubMed]

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Figures (4)

Fig. 1
Fig. 1

Cross section of the chicken breast tissue sample in the plane of the scanning with a thin fat strip embedded in it.

Fig. 2
Fig. 2

(a) Temporal profiles of two transmitted pulses through the 2.6-cm-thick sample: the dotted curve is for incidence through the center of the fat strip, and the solid curve is at a 5-mm distance from the center. A part of the reference pulse is shown at ~75 ps. (b) Snake photon diagram: the snake photons carry information about the scattering and the absorption properties of the fat tissue when the laser beam is incident at point A, whereas the snake photons at point B do not carry this information.

Fig. 3
Fig. 3

Time-integrated intensity from the transmitted signal through the 2.6-cm-thick sample at different time gates versus different beam-incidence positions: (a) 220–820 ps, (b) 120–967 ps, (c) 120–170 ps, and (d) 120–130 ps.

Fig. 4
Fig. 4

Time-integrated intensity from the transmitted signal through the 4-cm-thick sample with a 2.5-mm-thick fat strip within a 20-ps window (308–328 ps) versus different beam-incidence positions.

Equations (1)

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I d ( t ) = 1 4 t d 2 exp ( - v t / l a ) 1 m sin m π L d × exp [ - ( m π ) 2 D t / d 2 ] ,

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