Volumetric photoacoustic imaging using low-cost and easily fabricated planar array ultrasound transducers

Mahaan Mitra; Akshay Kumar; Shubham Khandare; Prameth Gaddale; Yashoda Anandan; Srian Pedibhotla; Kaustav Roy; Haoyang Chen; Rudra Pratap; Sri-Rajasekhar Kothapalli

doi:10.1117/12.3001634

12 March 2024 Volumetric photoacoustic imaging using low-cost and easily fabricated planar array ultrasound transducers

Mahaan Mitra, Akshay Kumar, Shubham Khandare, Prameth Gaddale, Yashoda Anandan, Srian Pedibhotla, Kaustav Roy, Haoyang Chen, Rudra Pratap, Sri-Rajasekhar Kothapalli

Author Affiliations +

Proceedings Volume 12842, Photons Plus Ultrasound: Imaging and Sensing 2024; 128420R (2024) https://doi.org/10.1117/12.3001634
Event: SPIE BiOS, 2024, San Francisco, California, United States

Conference Poster

Abstract

2-D Ultrasound (US) Transducer (2D-UST) arrays facilitate scan-less volumetric photoacoustic imaging (3D-PAI), but are typically high-cost, involve laborious fabrication process, and permit limited scalability in design with respect to array parameters like element count, aperture size, center frequency ( 𝑓_c) and array pitch. In this work, we report a novel, 2-D matrix UST array fabricated on a printed circuit board (PCB) substrate (2D-PCB-UST array) at low-cost and without the need of advanced cleanroom fabrication technologies. Further, the 2D-PCB-UST array parameters can be easily modified with PCB design software. We demonstrate the scalability by fabricating two arrays, (i) an 8×8 array with 1.5 mm pitch and 𝑓_c 40 MHz, and (ii) an 4×4 array with 1.2 mm pitch and 𝑓_c 11 MHz. Initial characterization results demonstrate wideband PA receive sensitivity, characterized by the 6-dB fractional bandwidth for both low and high frequency UST arrays. Phantom imaging results demonstrate 3D-PAI capabilities despite low element count and sparse array geometry.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Mahaan Mitra, Akshay Kumar, Shubham Khandare, Prameth Gaddale, Yashoda Anandan, Srian Pedibhotla, Kaustav Roy, Haoyang Chen, Rudra Pratap, and Sri-Rajasekhar Kothapalli "Volumetric photoacoustic imaging using low-cost and easily fabricated planar array ultrasound transducers", Proc. SPIE 12842, Photons Plus Ultrasound: Imaging and Sensing 2024, 128420R (12 March 2024); https://doi.org/10.1117/12.3001634

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