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Benchmark problems for transcranial ultrasound simulation: Intercomparison of compressional wave models

Aubry, Jean-Francois; Bates, Oscar; Boehm, Christian; Pauly, Kim Butts; Christensen, Douglas; Cueto, Carlos; Gélat, Pierre; ... Van 't Wout, Elwin; + view all (2022) Benchmark problems for transcranial ultrasound simulation: Intercomparison of compressional wave models. Journal of the Acoustical Society of America , 152 (2) pp. 1003-1019. 10.1121/10.0013426. Green open access

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Abstract

Computational models of acoustic wave propagation are frequently used in transcranial ultrasound therapy, for example, to calculate the intracranial pressure field or to calculate phase delays to correct for skull distortions. To allow intercomparison between the different modeling tools and techniques used by the community, an international working group was convened to formulate a set of numerical benchmarks. Here, these benchmarks are presented, along with intercomparison results. Nine different benchmarks of increasing geometric complexity are defined. These include a single-layer planar bone immersed in water, a multi-layer bone, and a whole skull. Two transducer configurations are considered (a focused bowl and a plane piston operating at 500 kHz), giving a total of 18 permutations of the benchmarks. Eleven different modeling tools are used to compute the benchmark results. The models span a wide range of numerical techniques, including the finite-difference time-domain method, angular spectrum method, pseudospectral method, boundary-element method, and spectral-element method. Good agreement is found between the models, particularly for the position, size, and magnitude of the acoustic focus within the skull. When comparing results for each model with every other model in a cross-comparison, the median values for each benchmark for the difference in focal pressure and position are less than 10% and 1 mm, respectively. The benchmark definitions, model results, and intercomparison codes are freely available to facilitate further comparisons.

Type: Article
Title: Benchmark problems for transcranial ultrasound simulation: Intercomparison of compressional wave models
Open access status: An open access version is available from UCL Discovery
DOI: 10.1121/10.0013426
Publisher version: https://doi.org/10.1121/10.0013426
Language: English
Additional information: Copyright © 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Keywords: Materials properties, Acoustic beamforming, Ultrasound, Acoustic wave propagation, Computational models, Hydrophone, Vector fields, Wave mechanics, MATLAB, Acoustic therapy
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Surgical Biotechnology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
URI: https://discovery.ucl.ac.uk/id/eprint/10154839
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