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Proceedings Paper

Photoacoustic imaging of a biological sample using in-phase-sum focus algorithm
Author(s): Wanshao Cai; Zhilei Tang; Da Xing
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Paper Abstract

Photoacoustic (PA) imaging is a new imaging modality, which converts pressure signals received by an array of transducers to a regional distribution of electromagnetic absorption density. In this paper we present an experiment result of a photoacoustic imaging to depths of approximately 3mm for a fabricated absorber within a real tissue, using a 1064-nm pulse YAG laser. The time-resolved stress detection technique was used for PA signal detection and an in-phase- sum-focus algorithm was used for image reconstruction. To obtain excellent temporal resolution, a wideband PVDF membrane hydrophone and a fast-digitizing oscilloscope was used for time-resolved detection of PA signals. A computer controlled translation stage on which the sample cell was fixed was used to a 2D scanning mode. Images of different depth profile was obtained with a lateral and depth resolution of approximately 0.5mm.

Paper Details

Date Published: 11 October 2000
PDF: 4 pages
Proc. SPIE 4224, Biomedical Photonics and Optoelectronic Imaging, (11 October 2000); doi: 10.1117/12.403983
Show Author Affiliations
Wanshao Cai, South China Normal Univ. (China)
Zhilei Tang, South China Normal Univ. (China)
Da Xing, South China Normal Univ. (China)


Published in SPIE Proceedings Vol. 4224:
Biomedical Photonics and Optoelectronic Imaging
Hong Liu; Qingming Luo, Editor(s)

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