A compact photoacoustic transrectal probe is constructed for improved imaging in brachytherapy treatment. A 192 element 5 MHz linear transducer array is mounted inside a small 3D printed casing along with an array of optical fibers. The device is fed by a pump laser and tunable NIR-optical parametric oscillator with data collected by a Verasonics ultrasound platform. This assembly demonstrates improved imaging of brachytherapy seeds in phantoms with depths up to 5 cm. The tuneable excitation in combination with standard US integration provides adjustable contrast between the brachytherapy seeds, blood filled tubes and background tissue.
Kevan L. Bell, Tyler Harrison, Nawaid Usmani, and Roger J. Zemp, "Integrated transrectal probe for translational ultrasound-photoacoustic imaging," Proc. SPIE 9708, Photons Plus Ultrasound: Imaging and Sensing 2016, 97080A (Presented at SPIE BiOS: February 14, 2016; Published: 15 March 2016); https://doi.org/10.1117/12.2211885.
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