压缩倾角薄层光学层析成像系统
投稿时间:2016-03-26  最后修改时间:2016-09-27  点此下载全文
引用本文:赵会娟,贾梦宇,秦转萍,王爽,陈雪颖,李娇,张林,高峰.压缩倾角薄层光学层析成像系统[J].红外与毫米波学报,2016,35(6):688~693].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].J.Infrared Millim.Waves,2016,35(6):688~693.]
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作者单位E-mail
赵会娟 天津大学 精密仪器与光电子工程学院 huijuanzhao@tju.edu.cn 
贾梦宇 天津大学 精密仪器与光电子工程学院  
秦转萍 天津市信息传感与智能控制重点实验室 qinzhuanping@126.com 
王爽 天津大学精密仪器与光电子工程学院  
陈雪颖 天津大学精密仪器与光电子工程学院  
李娇 天津大学精密仪器与光电子工程学院  
张林 天津大学精密仪器与光电子工程学院  
高峰 天津大学精密仪器与光电子工程学院 gaofeng@tju.edu.cn 
基金项目:国家自然科学基金[81271618,S81371602,S61475115,S61475116,S81401453,S61575140,S81571723]; 天津市自然科学基金[13JCZDJC28000,S14JCQNJC14400,S15JCZDJC31800,S15JCQNJC14500];天津职业技术师范大学校科研发展基金[KYQD14007]
中文摘要:首先研究了LOT中光线倾斜角度对光在组织体内分布的影响, 在此基础上设计并完成了压缩倾角薄层光学层析成像(cdaLOT)系统, 提出了矫正扫描振镜枕型畸变的新方法, 并发展了基于虚拟源-扩散近似技术和GPU的LOT快速图像重建算法.光路模拟结果表明, cdaLOT系统可使入射主光线倾角减小为传统LOT系统的1/2.cdaLOT系统将测量值与蒙特卡洛模拟结果的相对误差由传统系统的38%降低为18%, 从而缓解了实际测量方式和正向数学模型的不匹配性.仿体成像实验表明: 重建异质体的吸收系数、位置和形状与真实情况基本相符.
中文关键词:薄层光学层析成像  倾角  图像重建  测量系统
 
Laminar optical tomography system with condensed dip-angle
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.
keywords:laminar optical tomography, dip angle, image reconstruction, measurement system
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