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Chin. Phys. B, 2012, Vol. 21(1): 014301    DOI: 10.1088/1674-1056/21/1/014301
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Influence of limited-view scanning on depth imaging of photoacoustic tomography

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)
a Key Laboratory of Modern Acoustics of Ministry of Education, Nanjing University, Nanjing 210093, China; b Department of Radiology, University of Michigan, Ann Arbor, Michigan 48109, USA
Abstract  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.
Keywords:  photoacoustic tomography      limited-view scanning      depth imaging      back-projection reconstruction  
Received:  14 June 2011      Revised:  27 July 2011      Accepted manuscript online: 
PACS:  43.35.Ud (Thermoacoustics, high temperature acoustics, photoacoustic effect)  
  43.20.Ks (Standing waves, resonance, normal modes)  
  43.60.Pt (Signal processing techniques for acoustic inverse problems)  
Fund: 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), and the Natural Science Foundation of Jiangsu Province, China (Gran

Cite this article: 

Wu Dan(吴丹), Tao Chao(陶超), Liu Xiao-Jun(刘晓峻), and Wang Xue-Ding(王学鼎) Influence of limited-view scanning on depth imaging of photoacoustic tomography 2012 Chin. Phys. B 21 014301

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