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Published August 2008 | Published
Journal Article Open

Negative lens concept for photoacoustic tomography


Although a small point ultrasound transducer has a wide acceptance angle, its small active area leads to a high thermal-noise-induced electric voltage in the transducer, thus the sensitivity is low. By contrast, a finite-size flat transducer has high sensitivity, but the acceptance angle is small, which limits its application in reconstruction-based photoacoustic tomography (PAT). Here, we propose a negative lens concept to increase the acceptance angle of a flat transducer without losing sensitivity. Phantom experiments demonstrate that use of this concept greatly increases the detection region for PAT with high sensitivity.

Additional Information

© 2008 The American Physical Society. Received 4 March 2008; published 6 August 2008. This project was sponsored in part by National Institutes of Health Grants No. R01 NS46214 and No. R01 EB000712.

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Published - PhysRevE.78.021901.pdf


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August 19, 2023
October 20, 2023