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PROOF OF PRINCIPLE FOR FIELD BASED REFLECTANCE SPECTROSCOPY

PROOF OF PRINCIPLE FOR FIELD BASED REFLECTANCE SPECTROSCOPY
基于场的反射光谱的原理证明
批准号：
6121215
负责人：
CHANGHUEI YANG
金额：
$3.68万
依托单位：
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
依托单位国家：
美国
项目类别：
财政年份：
1999
资助国家：
美国
项目状态：
已结题
起止时间：
1999-06-01 至 2000-05-31
来源：
https://reporter.nih.gov/project-details/6121215
关键词：
biomedical resource human tissue lasers technology /technique

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The experiments employ a picosecond laser and time-resolved single photon counting detection. To study the photon paths, a screen with a small pinhole was inserted in the container filled with water solution of polystyrene microspheres (20-200 mean free paths across a container). The screen with pinhole was used to probe the photon paths within the scattering medium. By varying the position of the pinhole in the medium, the time-resolved photon path distribution can be mapped out. The existence of well-defined time-resolved photon paths demonstrated by these experiments provides the basis for a three-dimensional optical tomographic scheme. The results were in excellent agreement with path integral solution of transport equation and deviated from paths calculated using diffusion approximation.
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