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

doi:10.1088/1674-1056/21/1/014301

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

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

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