8 May 2018 Dual-foci detection in photoacoustic computed tomography with coplanar light illumination and acoustic detection: a phantom study
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Abstract
A dual-foci transducer with coplanar light illumination and acoustic detection was applied for the first time. It overcame the small directivity angle, low-sensitivity, and large datasets in conventional circular scanning or array-based photoacoustic computed tomography (PACT). The custom-designed transducer is focused on both the scanning plane with virtual-point detection and the elevation direction for large field of view (FOV) cross-sectional imaging. Moreover, a coplanar light illumination and acoustic detection configuration can provide ring-shaped light irradiation with highly efficient acoustic detection, which in principle has a better adaptability when imaging samples of irregular surfaces. Phantom experiments showed that our PACT system can achieve high resolution (∼0.5  mm), enhanced signal-to-noise ratio (16-dB improvement), and a more complete structure in a greater FOV with an equal number of sampling points compared with the results from a flat aperture transducer. This study provides the proof of concept for the fabrication of a sparse array with the dual-foci property and large aperture size for high-quality, low-cost, and high-speed photoacoustic imaging.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Xiangwei Lin, Xiangwei Lin, Chengbo Liu, Chengbo Liu, Jing Meng, Jing Meng, Xiaojing Gong, Xiaojing Gong, Riqiang Lin, Riqiang Lin, Mingjian Sun, Mingjian Sun, Liang Song, Liang Song, } "Dual-foci detection in photoacoustic computed tomography with coplanar light illumination and acoustic detection: a phantom study," Journal of Biomedical Optics 23(5), 050501 (8 May 2018). https://doi.org/10.1117/1.JBO.23.5.050501 . Submission: Received: 15 January 2018; Accepted: 21 February 2018
Received: 15 January 2018; Accepted: 21 February 2018; Published: 8 May 2018
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