Influence of limited-view scanning on depth imaging of photoacoustic tomography  

作　　者：Wu Dan Tao Chao Liu Xiao-Jun Wang Xue-Ding 吴丹;陶超;刘晓峻;王学鼎(Key Laboratory of Modern Acoustics of Ministry of Education,Nanjing University,Nanjing 210093,China;Department of Radiology,University of Michigan,Ann Arbor,Michigan 48109,USA)

机构地区：[1]Key Laboratory of Modern Acoustics of Ministry of Education,Nanjing University,Nanjing 210093,China [2]Department of Radiology,University of Michigan,Ann Arbor,Michigan 48109,USA

出　　处：《Chinese Physics B》2012年第1期273-278,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2012CB921504);the National Natural Science Foundation of China(Grant Nos.10874088,10904069,and 11028408);the Natural Science Foundation of Jiangsu Province,China(Grant No.SBK201021985)

摘　　要：We study the influence of limited-view scanning on the depth imaging of photoacoustic tomography. The situation, in which absorbers are located at different depths with respect to the limited-view scanning trajectory, is called depth imaging and is investigated in this paper. The results show that limited-view scanning causes the reconstructed intensity of deep absorbers to be weaker than that of shallow ones and that deep absorbers will be invisible if the scanning range is too small. The concept of effective scanning angle is proposed to analyse that phenomenon. We find that an effective scanning angle can well predict the relationship between scanning angle and the intensity ratio of absorbers. In addition, limited-view scanning is employed to improve image quality.We study the influence of limited-view scanning on the depth imaging of photoacoustic tomography. The situation, in which absorbers are located at different depths with respect to the limited-view scanning trajectory, is called depth imaging and is investigated in this paper. The results show that limited-view scanning causes the reconstructed intensity of deep absorbers to be weaker than that of shallow ones and that deep absorbers will be invisible if the scanning range is too small. The concept of effective scanning angle is proposed to analyse that phenomenon. We find that an effective scanning angle can well predict the relationship between scanning angle and the intensity ratio of absorbers. In addition, limited-view scanning is employed to improve image quality.

关 键 词：photoacoustic tomography limited-view scanning depth imaging back-projection re-construction 

分 类 号：O438[机械工程—光学工程]