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9 March 2023 Photoacoustic hyper-beamformation array imaging
Chun-Hsien Chiang, Meng-Lin Li
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Proceedings Volume PC12379, Photons Plus Ultrasound: Imaging and Sensing 2023; PC123790X (2023) https://doi.org/10.1117/12.2650955
Event: SPIE BiOS, 2023, San Francisco, California, United States
Abstract
Delay-and-sum beamformation (DAS), i.e., back-projection is the most common PAI image reconstruction algorithm. Here we propose a novel PAI image reconstruction technique – hyper-beamformation (HBF), which reaches significantly low sidelobes compared with DAS, outperforms delay-multiply-and-sum (DMAS) with lower complexity, and offers tunability on lateral resolution, precision, and contrast. Via the subtraction of the beam-pattern difference of the left and right sub-arrays from their beam-pattern sum, a hyper beam with narrow mainlobe, low sidelobes, and suppressed grating-lobe artifact can be obtained. Experimental results show that our proposed HBF has significant improvement on precision and contrast.
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Chun-Hsien Chiang and Meng-Lin Li "Photoacoustic hyper-beamformation array imaging", Proc. SPIE PC12379, Photons Plus Ultrasound: Imaging and Sensing 2023, PC123790X (9 March 2023); https://doi.org/10.1117/12.2650955
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KEYWORDS
Imaging arrays
Photoacoustic imaging
Photoacoustic spectroscopy
Image resolution
Image restoration
Reconstruction algorithms
Absorption
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