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Proceedings Paper

Influence on imaging qualitites of photoacoustic tomography caused by mismatch of ultrasonic velocities
Author(s): Sihua Yang; Huaimin Gu
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Paper Abstract

In this paper, Influences of the acoustic path difference on photoacoustic (PA) images caused by mismatch of ultrasonic velocities were studied. We first proposed using the concentration-adjustable glycerite as an ultrasonic transmitting medium. By switching a appropriate concentration of the glycerite, it can make the velocities of the PA signals keep constant between transmitting medium and biological tissues, and avoid the acoustic path difference (APD) in image reconstruction. The experiments demonstrate that the acoustic path difference influences the imaging qualities badly: especially, the spatial resolution of PA image is extremely reduced. After matching ultrasonic velocity by glycerite the contrast of the reconstructed image is improved greatly and the background artifacts are reduced obviously. The spatial resolution of the reconstructed image is improved from 0.5mm to 0.15mm. It has great practical significance for applying photoacoustic tomography to noninvasive clinic diagnosis of cancer.

Paper Details

Date Published: 27 October 2006
PDF: 6 pages
Proc. SPIE 6047, Fourth International Conference on Photonics and Imaging in Biology and Medicine, 60470J (27 October 2006); doi: 10.1117/12.710945
Show Author Affiliations
Sihua Yang, South China Normal Univ. (China)
Huaimin Gu, South China Normal Univ. (China)


Published in SPIE Proceedings Vol. 6047:
Fourth International Conference on Photonics and Imaging in Biology and Medicine
Kexin Xu; Qingming Luo; Da Xing; Alexander V. Priezzhev; Valery V. Tuchin, Editor(s)

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