Imaging through scattering media by the use of an analytical model of perturbation amplitudes in the time domain

被引：53

作者：

Hebden, JC ^{[1
]}

Arridge, SR ^{[1
]}

机构：

[1] UNIV LONDON UNIV COLL, DEPT COMP SCI, LONDON WC1E 6BT, ENGLAND

来源：

APPLIED OPTICS | 1996年 / 35卷 / 34期

关键词：

time-resolved imaging; diffusion theory; time of flight;

D O I：

10.1364/AO.35.006788

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A method of generating images through highly scattering media is presented that involves comparing measurements of the time-dependent intensity of transmitted light with an analytical model describing the sensitivity of that intensity on localized changes in optical properties. A least-squares fitting procedure is employed to derive the amplitudes of the measurement perturbations caused by embedded absorbers and scatterers located along a line of sight between the source and detector. Images are presented of a highly scattering, solid plastic phantom with optical properties closely matched to those of human breast tissue at near-infrared wavelengths. The phantom is a 54-mm-thick slab, containing four small cylinders of contrasting scatter and absorption. Results show that embedded absorbers can be distinguished from embedded scatterers, and that the diffusion perturbation amplitude provides inherently greater spatial resolution than the absorption perturbation amplitude. (C) 1996 Optical Society of America

引用

页码：6788 / 6796

页数：9

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