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23 February 2010A high-speed photoacoustic tomography system based on a commercial ultrasound and a custom transducer array
Building photoacoustic imaging systems by using stand-alone ultrasound (US) units makes it convenient to take
advantage of the state-of-the-art ultrasonic technologies. However, the sometimes limited receiving sensitivity and the
comparatively narrow bandwidth of commercial US probes with elements driving long cables may not be sufficient for
high quality photoacoustic imaging. In this work, a high-speed photoacoustic tomography (PAT) system has been
developed using a commercial US unit and a custom built 128-element PVDF transducer array. Since the US unit
supports simultaneous signal acquisition from 64 parallel receive channels, PAT data for synthetic image formation from
a 64 or 128 element array aperture can be acquired after a single or dual laser firing, respectively. The PVDF array
provides satisfactory receiving sensitivity and uniquely broad detection bandwidth, which enables good image quality
for tomographic photoacoustic imaging. A specially designed
128-channel preamplifier board that connects the preamps
directly to the PVDF elements not only enables impedance matching but also further elevates the signal-to-noise ratio in
detecting weak photoacoustic signals. To examine the performance of this imaging system, experiments on phantoms
were conducted and the results were compared with those acquired with commercial US probes.
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Xueding Wang, Jonathan Cannata, Derek DeBusschere, Changhong Hu, J. Brian Fowlkes, Paul Carson, "A high-speed photoacoustic tomography system based on a commercial ultrasound and a custom transducer array," Proc. SPIE 7564, Photons Plus Ultrasound: Imaging and Sensing 2010, 756424 (23 February 2010); https://doi.org/10.1117/12.842666