Dual-modality imaging system combined fast photoacoustic imaging and ultrasound imaging

Liangzhong Xiang; Yi Yuan

doi:10.1117/12.845463

28 October 2009 Dual-modality imaging system combined fast photoacoustic imaging and ultrasound imaging

Liangzhong Xiang, Yi Yuan

Proceedings Volume 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009); 75190G (2009) https://doi.org/10.1117/12.845463
Event: Photonics and Optoelectronics Meetings 2009, 2009, Wuhan, China

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.

Citation Download Citation

Liangzhong Xiang and Yi Yuan "Dual-modality imaging system combined fast photoacoustic imaging and ultrasound imaging", Proc. SPIE 7519, Eighth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2009), 75190G (28 October 2009); https://doi.org/10.1117/12.845463

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KEYWORDS

Ultrasonography

Transducers

Imaging systems

Photoacoustic imaging

Photoacoustic spectroscopy

Tumors

Signal detection

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