Presentation 2008-08-28
A Study for Estimating Optical Parameters in Scattering Media by Utilizing Time-Resolved Diffused Optical Tomography
Seiki KAWASAKI, Akira KOBAYASHI, Tadatoshi TANIFUJI,
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Abstract(in English) Reconstructed image quality improvements of inhomogeneous scattering medium utilizing time-resolved optical tomography has been studied. Only backscattered optical pulses are used to reconstruct optical absorption coefficient images of two-dimensional scattering medium of 80×40mm^2. Experimental pulses are simulated by superimposing Poisson random variables on theoretical pulse calculated by finite difference time domain (FDTD) method. Optical parameters are estimated by minimizing least mean squares of theoretical and experimental pulse amplitude utilizing conjugate gradient (CG) method. It has been become clear that estimated optical absorption coefficients accuracies are improved by expanding Yee grid increments from 2 to 4mm, which reduce the number of estimated optical parameters to one fourth. It has also been become clear that TN minimizations reconstruct highly accurate images compared with CG when source-detector separation is reduced to 8mm.
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Keyword(in English) Time-resolved diffused optical tomography / Conjugate gradient method / Truncated Newton method / FDTD analysis / Optical parameters
Paper # OFT2008-21
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Committee OFT
Conference Date 2008/8/21(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Study for Estimating Optical Parameters in Scattering Media by Utilizing Time-Resolved Diffused Optical Tomography
Sub Title (in English)
Keyword(1) Time-resolved diffused optical tomography
Keyword(2) Conjugate gradient method
Keyword(3) Truncated Newton method
Keyword(4) FDTD analysis
Keyword(5) Optical parameters
1st Author's Name Seiki KAWASAKI
1st Author's Affiliation Department of Electrical and Electronics Engineering, Kitami Institute of Technology()
2nd Author's Name Akira KOBAYASHI
2nd Author's Affiliation Department of Electrical and Electronics Engineering, Kitami Institute of Technology
3rd Author's Name Tadatoshi TANIFUJI
3rd Author's Affiliation Department of Electrical and Electronics Engineering, Kitami Institute of Technology
Date 2008-08-28
Paper # OFT2008-21
Volume (vol) vol.108
Number (no) 190
Page pp.pp.-
#Pages 4
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