@inproceedings{592445549fb542599a8798023cef9a78,
title = "Distributed Aberration Correction in Handheld Ultrasound Based on Tomographic Estimates of the Speed of Sound",
abstract = "Phase aberration is one the key sources of image degradation in handheld B-mode ultrasound imaging. Sound speed heterogeneities create phase aberrations in the image by inducing additional tissue-dependent delays and diffractive effects that conventional beamforming does not incorporate. For this reason, the Fourier split-step angular spectrum method is used to simulate pressure fields in a heterogeneous sound speed medium and create B-mode images based on the cross-correlation of transmitted and received wavefields. Because the strongest aberrations are caused by a laterally varying sound speed profile, this work presents a new sound speed estimator that can be used to correct for aberrations in laterally varying media. Phantom experiments show a 58-76% improvement in point target resolution and a 2.5x improvement in contrast-to-noise ratio because of the proposed sound speed estimation and phase aberration correction scheme.",
keywords = "Fourier split-step migration, Nonlinear inverse problems, aberration correction, lag-one coherence, pulse-echo ultrasound, reflection tomography, speed-of-sound imaging, time-shift gathers",
author = "Rehman Ali and Trevor Mitcham and Melanie Singh and Richard Bouchard and Jeremy Dahl and Marvin Doyley and Nebojsa Duric",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; Medical Imaging 2023: Ultrasonic Imaging and Tomography ; Conference date: 22-02-2023 Through 23-02-2023",
year = "2023",
doi = "10.1117/12.2653935",
language = "English (US)",
series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",
publisher = "SPIE",
editor = "Christian Boehm and Nick Bottenus",
booktitle = "Medical Imaging 2023",
}