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Proceedings Paper

Dual-modality imaging system combined fast photoacoustic imaging and ultrasound imaging
Author(s): Liangzhong Xiang; Yi Yuan
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Paper Abstract

In this paper, we have developed a fast dual-modality imaging system for reconstruction photoacoustic and ultrasound imaging based on a novel digital phased array. The scanning mode and image reconstruction algorithms were modified from our previous work to improve the image quality. A 128-element linear transducer array is connected to a multichannel signal acquisition and digital beam-formation system providing techniques of dynamic receiving focus and dynamic receiving apodization to process the signal. We use the linear transducer array with combined scanning mode to detect signals at multiple locations on a circle around the sample. It makes our dual-modality imaging own the ability of imaging complicated structures of objects. An improved limited-field filtered back projection algorithm with directivity factors was applied in photoacoustic imaging to further improve the lateral resolution. Phase-controlled imaging algorithm was applied to reconstruct acoustical impedance difference in the pure ultrasound imaging. The experiments on phantoms and in vivo early breast cancer detection in a mouse model were performed. The images are clearly, accurately provided.

Paper Details

Date Published: 28 October 2009
PDF: 9 pages
Proc. SPIE 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009), 75190G (28 October 2009); doi: 10.1117/12.845463
Show Author Affiliations
Liangzhong Xiang, South China Normal Univ. (China)
Yi Yuan, South China Normal Univ. (China)

Published in SPIE Proceedings Vol. 7519:
Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009)
Qingming Luo; Lihong V. Wang; Valery V. Tuchin; Pengcheng Li; Ling Fu, Editor(s)

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