成像深度对光声层析成像的影响  

Influence of imaging depth on photoacoustic tomography

作　　者：谭毅[1] 李长辉[2] TAN Yi LI Chang-hui(School of Physics and Telecommunication Engineering, Shaanxi SCI- TECH University, Hanzhong 723001, China Department of Biomedical Engineering, College of Engineering ,Peking University , Beijing 100871, China)

机构地区：[1]陕西理工大学物理与电信工程学院,陕西汉中723001 [2]北京大学工学院生物医学工程系,北京100871

出　　处：《中国光学》2016年第5期515-522,共8页Chinese Optics

基　　金：国家重大科学仪器专项资助项目(No.2011YQ030114);国家重点基础研究发展计划(973计划)资助项目(No.2011CB707502);国家自然科学基金资助项目(No.11104058)~~

摘　　要：为了研究不同成像深度对光声层析成像质量的影响,利用多元线性阵列探测器在有限方位进行探测成像。由仿真和实验结果表明,吸收体离探测器越近,其成像效果较好,当多元线性阵列探测器的尺寸与成像深度比小于1时,重建图像畸变明显。在这种情况下,采用旋转扫描探测,其成像效果明显提高。该研究结果对光声层析成像扫描轨迹的设计、成像效果评估具有较好的参考价值。In order to research on the influence of imaging depth on photoacoustic tomography,the multiple linear array detectors is used for detection imaging at limited-view. Both simulation and experimental results show that the reconstructed image qualities are better as the absorber is closer to the detectors. Image distortion becomes obvious when the ratio of detectors size to the imaging depth is less than 1. We also demonstrated that the image distortion can be significantly reduced by rotating the multiple linear array detectors. This study helps the design of scanning strategy and the evaluation of reconstructed images.

关 键 词：光声层析成像 成像深度 医用光学与生物技术 

分 类 号：Q334[生物学—遗传学]