Effect of center frequency and bandwidth of ultrasonic transducer on photoacoustic tomography based on virtual PAT

Chenfeng Pan; Shangkun Hou; Qianxiang Wan; Gang Hu; Jiahao Zeng; Wenhua Zhong; Shuchong Peng; Kanggao Tang; Xianlin Song

doi:10.1117/12.2683131

18 July 2023 Effect of center frequency and bandwidth of ultrasonic transducer on photoacoustic tomography based on virtual PAT

Chenfeng Pan, Shangkun Hou, Qianxiang Wan, Gang Hu, Jiahao Zeng, Wenhua Zhong, Shuchong Peng, Kanggao Tang, Xianlin Song

Author Affiliations +

Proceedings Volume 12745, Sixteenth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2023); 127450J (2023) https://doi.org/10.1117/12.2683131
Event: Sixteenth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2023), 2023, Haikou, China

Abstract

Photoacoustic tomography is a new hybrid imaging technology, which combines the high contrast of optics imaging with the high penetration of acoustics imaging, moreover, which provides deep imaging of biological tissue. At present, photoacoustic tomography has been widely applied in biomedical research, such as brain imaging, cancer diagnosis, and vascular imaging. However, constructing a photoacoustic imaging system is costly and complex. In this study, a simulation platform for photoacoustic tomography was established based on the k-wave toolbox. Using this virtual photoacoustic tomography platform, the process of ultrasonic signal generation is simulated, the signals are collected by the same number of ultrasonic transducers at different center frequencies, and multiple groups of reconstructed images are obtained using the back projection algorithm. The relationship between the center frequency and the quality of the reconstructed image is analyzed to show that when an appropriate center frequency is selected, the ultrasonic transducer can effectively receive the photoacoustic signal; when the selected center frequency is too large or too small, the ultrasonic transducer may not effectively receive the photoacoustic signal, leading to the loss of some detailed features of the original image, which can result in an increase in the number of artifacts. Therefore, by selecting an appropriate center frequency of ultrasonic transducers, the quality of reconstructed images can be effectively improved.

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Chenfeng Pan, Shangkun Hou, Qianxiang Wan, Gang Hu, Jiahao Zeng, Wenhua Zhong, Shuchong Peng, Kanggao Tang, and Xianlin Song "Effect of center frequency and bandwidth of ultrasonic transducer on photoacoustic tomography based on virtual PAT", Proc. SPIE 12745, Sixteenth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2023), 127450J (18 July 2023); https://doi.org/10.1117/12.2683131

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KEYWORDS

Ultrasound transducers

Image restoration

Ultrasonics

Photoacoustic tomography

Photoacoustic spectroscopy

Photoacoustic imaging

Reconstruction algorithms

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