TY - JOUR
T1 - Synthetic-aperture based photoacoustic re-beamforming (SPARE) approach using beamformed ultrasound data
AU - Zhang, Haichong K.
AU - Bell, Muyinatu A.Lediju
AU - Guo, Xiaoyu
AU - Kang, Hyun Jae
AU - Boctor, Emad
N1 - Funding Information:
Financial supports were provided by Johns Hopkins University internal funds, National Stroke Foundation, NSF Grant No. IIS-1162095, National Institutes of Health, NIH Grant No. R21CA202199, and National Institutes of Health, NIBIB-NIH Grant No. EB015638. M.A. Lediju Bell is supported by National Institutes of Health, NIH grant K99 EB018994
Publisher Copyright:
© 2016 Optical Society of America.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - Photoacoustic (PA) imaging has been developed for various clinical and preclinical applications, and acquiring pre-beamformed channel data is necessary to reconstruct these images. However, accessing these pre-beamformed channel data requires custom hardware to enable parallel beamforming, and is available for a limited number of research ultrasound platforms. To broaden the impact of clinical PA imaging, our goal is to devise a new PA reconstruction approach that uses ultrasound post-beamformed radio frequency (RF) data rather than raw channel data, because this type of data is readily available in both clinical and research ultrasound systems. In our proposed Synthetic-aperture based photoacoustic rebeamforming (SPARE) approach, post-beamformed RF data from a clinical ultrasound scanner are considered as input data for an adaptive synthetic aperture beamforming algorithm. When receive focusing is applied prior to obtaining these data, the focal point is considered as a virtual element, and synthetic aperture beamforming is implemented assuming that the photoacoustic signals are received at the virtual element. The resolution and SNR obtained with the proposed method were compared to that obtained with conventional delayand- sum beamforming with 99.87% and 91.56% agreement, respectively. In addition, we experimentally demonstrated feasibility with a pulsed laser diode setup. Results indicate that the post-beamformed RF data from any commercially available ultrasound platform can potentially be used to create PA images.
AB - Photoacoustic (PA) imaging has been developed for various clinical and preclinical applications, and acquiring pre-beamformed channel data is necessary to reconstruct these images. However, accessing these pre-beamformed channel data requires custom hardware to enable parallel beamforming, and is available for a limited number of research ultrasound platforms. To broaden the impact of clinical PA imaging, our goal is to devise a new PA reconstruction approach that uses ultrasound post-beamformed radio frequency (RF) data rather than raw channel data, because this type of data is readily available in both clinical and research ultrasound systems. In our proposed Synthetic-aperture based photoacoustic rebeamforming (SPARE) approach, post-beamformed RF data from a clinical ultrasound scanner are considered as input data for an adaptive synthetic aperture beamforming algorithm. When receive focusing is applied prior to obtaining these data, the focal point is considered as a virtual element, and synthetic aperture beamforming is implemented assuming that the photoacoustic signals are received at the virtual element. The resolution and SNR obtained with the proposed method were compared to that obtained with conventional delayand- sum beamforming with 99.87% and 91.56% agreement, respectively. In addition, we experimentally demonstrated feasibility with a pulsed laser diode setup. Results indicate that the post-beamformed RF data from any commercially available ultrasound platform can potentially be used to create PA images.
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U2 - 10.1364/BOE.7.003056
DO - 10.1364/BOE.7.003056
M3 - Article
C2 - 27570697
AN - SCOPUS:84980038899
SN - 2156-7085
VL - 7
SP - 3056
EP - 3069
JO - Biomedical Optics Express
JF - Biomedical Optics Express
IS - 8
ER -