Improving the image quality of photoacoustic tomography (PAT) by using a negative acoustic lens

Changhui Li; Geng Ku; Lihong V. Wang

doi:10.1117/12.763533

28 February 2008 Improving the image quality of photoacoustic tomography (PAT) by using a negative acoustic lens

Changhui Li, Geng Ku, Lihong V. Wang

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 685623 (2008) https://doi.org/10.1117/12.763533
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Although a small point ultrasound transducer has a wide acceptance angle, its signal-to-noise (SNR) is low due to the high thermal-noise-induced electric voltages in the transducer, which is a result of its small active area. By contrast, a finite size flat transducer has high sensitivity (good SNR), but the acceptance angle is generally small, which limits its application in reconstruction-based photoacoustic tomography (PAT). In this paper, we report a negative lens concept to increase the acceptance angle for a flat transducer. We also provide phantom experiments that demonstrate this concept can greatly increase the detection region for PAT and without losing sensitivity.

Citation Download Citation

Changhui Li, Geng Ku, and Lihong V. Wang "Improving the image quality of photoacoustic tomography (PAT) by using a negative acoustic lens", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 685623 (28 February 2008); https://doi.org/10.1117/12.763533

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