Measurements of time-resolved transmittances through cylindrical solid phantoms. Comparison with 2D and 3D FEM simulations

被引：4
|
作者：
Proskurin, SG
Takahashi, S
Kwee, I
Tanikawa, Y
Yamada, Y
机构：
来源：
OPTICAL TOMOGRAPHY AND SPECTROSCOPY OF TISSUE: THEORY, INSTRUMENTATION, MODEL, AND HUMAN STUDIES II, PROCEEDINGS OF | 1997年 / 2979卷
关键词：
optical tomography; inhomogeneity detection; time-resolved transmittance; highly scattering media; optical properties; tissue-like phantom;
D O I：
10.1117/12.280253
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
Experimentally acquired time-resolved sind continuous-wave diffuse transmittances of near-infrared light through cylindrical solid phantoms are presented. Homogeneous and inhomogeneous tissue-like phantoms (68 mm diameter, epoxy resin) were used. The transmittances were acquired at 18 degrees intervals around the phantoms. Experimental results are compared with results of two dimensional and three dimensional finite-element simulations. The influence of absorbing boundaries on the shape of time-resolved and continuous-wave transmittances has been investigated for slab and cylindrical geometry. Analytical solutions of the photon diffusion equation with reflecting and absorbing boundary conditions were applied to estimate the optical properties of the material. A new index, time-resolved homogeneity index, is introduced for quick and simple inhomogeneity detection prior to image reconstruction.
引用
收藏
页码：261 / 271
页数：11
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