Frequency-domain methods in optical tomography: detection of localized absorbers and a backscattering reconstruction scheme
Frequency-domain methods in optical tomography: detection of localized absorbers and a backscattering reconstruction scheme
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光学断层扫描中的频域方法：局部吸收体的检测和反向散射重建方案
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
E. Gratton
中科院分区：
文献类型：
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作者：
J. Maier;E. Gratton
我们研究了检测嵌入在高散射介质中的小型吸收物体的能力。不同尺寸的吸收球（半径为 0.8 毫米至 6.8 毫米）浸没在高散射、低吸收液体（脱脂牛奶）的溶液中，在透射照明几何中进行了研究。还研究了由多个球体和单个圆盘组成的组，其半径与其中一个球体的半径相同。在球体平面上进行单次线性光栅扫描，球体位于源和探测器之间的中心。数据在频域中获取，产生物体在三个可测量量中的每一个的轮廓：直流强度、相位和调制。球体的衍射图案与圆盘的衍射图案不同，证明了与光子扩散相关的体积效应。多个球体的衍射图案与单个球体的衍射图案不同。
We studied the ability to detect small absorbing objects embedded in a highly scattering medium. Absorbing spheres of varying size, from 0.8 mm to 6.8 mm radius, submerged in a solution of highly scattering, low absorbing liquid: skim milk, were studied in a trans- illumination geometry. Groups of more than one sphere and a single circular disk, with radius identical to that of one of the spheres, were also studied. Single linear raster scans in the plane of the sphere, with the spheres centered between the source and detector, were made. Data was taken in the frequency-domain, yielding profiles of the objects in each of the three measurable quantities: dc intensity, phase, and modulation. The diffraction pattern form the sphere differed from that of the disk, demonstrating a volume effect associated with photon diffusion. The diffraction pattern of multiple spheres differed from that of single spheres.