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5 March 2021 Optimum receive apodization for photoacoustic imaging using a CMUT
Amir Gholampour, Hans-Martin Schwab, Min Wu, Richard G. P. Lopata
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Proceedings Volume 11642, Photons Plus Ultrasound: Imaging and Sensing 2021; 116423L (2021) https://doi.org/10.1117/12.2578323
Event: SPIE BiOS, 2021, Online Only
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Abstract
Capacitive micromachined ultrasound transducers (CMUTs) are gaining more interest for photoacoustic imaging due to its low-cost, high bandwidth and flexibility in size and shape. However, the beampattern of CMUTs usually exhibits wide mainlobes and high sidelobes, degrading the imaging resolution and contrast. We propose to improve the beampattern with optimization of apodization by imposing conditions on the angular distribution of the signal energy received from a PA point source to minimize the sidelobes magnitude and maintain the mainlobe energy. Both simulations and experiments results demonstrate that the proposed apodization suppress the sidelobes up to 30dB when compared with Uniform weights.
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Amir Gholampour, Hans-Martin Schwab, Min Wu, and Richard G. P. Lopata "Optimum receive apodization for photoacoustic imaging using a CMUT", Proc. SPIE 11642, Photons Plus Ultrasound: Imaging and Sensing 2021, 116423L (5 March 2021); https://doi.org/10.1117/12.2578323
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KEYWORDS
Apodization
Photoacoustic imaging
Computer programming
Convex optimization
Optical filters
Pulsed laser operation
Tunable lasers
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