NDLI: Reconstruction of absorption distribution in diffuse medium using backscattered light

Content Provider	IEEE Xplore Digital Library
Author	Awata, A. Kato, Y. Shimizu, K.
Copyright Year	1998
Description	Author affiliation: Dept. of Bioeng., Hokkaido Univ., Sapporo, Japan (Awata, A.)
Abstract	Near-infrared light at 700-1200 nm has high transmission through the human body. However, there is strong scattering in the body tissue and it is difficult to obtain an image of the internal structure of our body. There has been an increasing interest in the study of light propagation in dense random media to realize optical CT. With optical CT, physiological information such as hemoglobin oxygenation in the body can be obtained as a cross-sectional image noninvasively. In optical CT, two types of light-detection schemes have been used. One detects the transmitted or forwardly scattered light, and another the backwardly scattered light (here we call it as backscattered light). Using transmitted light, we can have the whole cross-sectional image of the subject. But the thickness of the subject has to be thin enough to get transmitted light. Using backscattered light, we can obtain the cross-sectional image of only a certain part near the surface of the subject. However, the applicability of this technique is not restricted by the thickness of the subject. In the combination with optical fibers, it is particularly useful in the clinical applications, such as the imaging of inner walls of digestive tracts, blood vessels and heart chambers. We have developed a new technique to reconstruct the cross-sectional image of a diffuse medium using backscattered light. This paper presents the basic idea of this technique and some results of a computer simulation to examine the capability of this technique.
Starting Page	36
Ending Page	38
File Size	323148
Page Count	3
File Format	PDF
ISBN	0780344030
DOI	10.1109/IGARSS.1998.702790
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-07-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Absorption Optical scattering Light scattering Computed tomography Image reconstruction Humans Optical propagation Random media Optical fibers Application software
Content Type	Text
Resource Type	Article

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