Laminar optical tomography system with condensed dip-angle
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College of Precision Instruments Optoelectronics Engineering,Tianjin University,College of Precision Instruments Optoelectronics Engineering,Tianjin University,Tianjin Key Laboratory of Information Sensing and Intelligent Control,College of Precision Instruments Optoelectronics Engineering,Tianjin University,College of Precision Instruments Optoelectronics Engineering,Tianjin University,College of Precision Instruments Optoelectronics Engineering,Tianjin University,College of Precision Instruments Optoelectronics Engineering,Tianjin University,College of Precision Instruments Optoelectronics Engineering,Tianjin University

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    Abstract:

    The influence of the dip angle on light distribution inside tissue was investigated. Based on the investigation, a LOT system with condensed dip-angle (cdaLOT) over the whole detection range was developed. A new method for correcting the deflection-angle of galvanometer mirrors was also proposed. A fast image reconstruction algorithm for LOT was also developed based on the virtual-source diffusion approximation and GPU. Light path simulation showed that the developed cdaLOT system decreased the dip angle of the incident light to 1/2 of that of the traditional LOT system. The relative deviation of the measured data to MC results was about 18% for cdaLOT while that for traditional LOT was as large as 38%. Reconstructed images showed that the reconstructed absorption coefficient, and the position and shape of the inhomogeneity coincided with the real target.

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ZHAO Hui-Juan, JIA Meng-Yu, QIN Zhuan-Ping, WANG Shuang, CHEN Xue-Ying, LI Jiao, ZHANG Lin, GAO Feng. Laminar optical tomography system with condensed dip-angle[J]. Journal of Infrared and Millimeter Waves,2016,35(6):688~693

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History
  • Received:March 26,2016
  • Revised:September 27,2016
  • Adopted:May 09,2016
  • Online: December 06,2016
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