Cross-sectional imaging of absorption distribution in biological tissue using backscattered light

Aki Awata, Yuji Kato, Koichi Shimizu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A technique was developed to reconstruct the cross-sectional image of the absorption distribution in a diffuse medium using backscattered light. In this technique, we illuminate an object with an ultra-short pulse, and measure the time-resolved pulse shape of the light backscattered from the object. The absorption distribution of the scattering object can be estimated using the propagation-path distribution of photons at each detection time and the optical impulse response of backscattered light. In a simulation, the effectiveness of this technique was verified in the cases of a layered absorber and a three dimensional absorber. The nonlinear relationship between the depth of the probing region and the propagation time was clarified. The accuracy of the image reconstruction was significantly improved by the aperiodic sampling of the backscattered impulse response according to the nonlinear relation. The feasibility of the proposed technique was verified in the experiment with a model phantom.

Original languageEnglish
Pages (from-to)124-132
Number of pages9
JournalIEICE Transactions on Information and Systems
VolumeE85-D
Issue number1
Publication statusPublished - 2002 Jan

Keywords

  • Backscattering
  • Biological body
  • CT
  • Diffuse media
  • Optical measurement

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering
  • Artificial Intelligence

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