Preliminary study on estimation of flow velocity vectors using focused transmit beams

High-frame-rate ultrasound imaging with plane wave transmissions is a predominant method of blood flow imaging, and methods for estimation of blood flow velocity vectors have been developed based on high-frame-rate imaging. On the other hand, in imaging of soft tissues, such as arterial walls and at...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2022-07, Vol.61 (SG), p.SG1026
Main Authors: Hasegawa, Hideyuki, Mozumi, Michiya, Omura, Masaaki, Nagaoka, Ryo, Saito, Kozue
Format: Article
Language:English
Subjects:
Atherosclerosis
Beamforming
Blood flow
blood flow imaging
Flow velocity
Imaging
In vivo methods and tests
multi-angle Doppler
parallel beamforming
Plane waves
Soft tissues
Steering
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Summary:High-frame-rate ultrasound imaging with plane wave transmissions is a predominant method of blood flow imaging, and methods for estimation of blood flow velocity vectors have been developed based on high-frame-rate imaging. On the other hand, in imaging of soft tissues, such as arterial walls and atherosclerotic plaques, high-frame-rate imaging sometimes suffers from high-level clutters. Even in observation of the arterial wall with a focused transmit beam, it would be highly beneficial if blood flow velocity vectors could be estimated simultaneously. We conducted a preliminary study on the estimation of blood flow velocity vectors based on a multi-angle Doppler method with focused transmit beam and parallel receive beamforming. It was shown that the lowest estimation error was achieved at a steering angle of 25° by simulation. Moreover, velocity vectors with typical velocity magnitudes and directions could be obtained by the proposed method in in vivo measurement of a carotid artery.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/ac4687