Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session M15: Physics in Medicine: Innovations in Imaging
11:30 AM–1:30 PM,
Wednesday, March 17, 2021
Sponsoring
Unit:
GMED
Chair: Urban Simoncic
Abstract: M15.00002 : Novel approach for ultrafast ultrasound image formation in complex media: aberration correction and real-time speed-of-sound mapping
11:42 AM–11:54 AM
Live
Presenter:
Hanna Bendjador
(Stanford Univ)
Authors:
Hanna Bendjador
(Stanford Univ)
Thomas Deffieux
(Physics for Medicine Paris, ESPCI Paris, INSERM, CNRS, PSL)
Mickaël Tanter
(Physics for Medicine Paris, ESPCI Paris, INSERM, CNRS, PSL)
Plane waves were transmitted with a programmable scanner, driving a 192-element linear probe, at central frequency of 6.25MHz. We proposed an approach based on Singular Value Decomposition of the beamformed images at each transmit angle. We demonstrated that the first angular singular vector gives the amplitude and phase aberration law in the plane wave basis. The first spatial singular vector provides a corrected image.
Angular and canonical aberrations were proven to be fully recovered by the SVD Beamforming approach both in simulation and in vitro. In vivo images of human liver, and mouse brain obtained through the skull, showed a remarkable improvement (+8dB). In addition, phase aberration knowledge allows to quantitatively compute sound speed mapping. Outstandingly, this method offers efficient adaptive and quantitative imaging at ultrafast frame rates; paving the way to transcranial ultrasound imaging at unprecedented temporal and spatial resolutions.
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