中国物理B ›› 2012, Vol. 21 ›› Issue (1): 14301-014301.doi: 10.1088/1674-1056/21/1/014301
王学鼎1, 吴丹2, 陶超2, 刘晓峻2
Wu Dan(吴丹)a), Tao Chao(陶超)a)†, Liu Xiao-Jun(刘晓峻)a)‡, and Wang Xue-Ding(王学鼎)b)
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.
中图分类号: (Thermoacoustics, high temperature acoustics, photoacoustic effect)