Work

Non-Uniform Time-Stepping in k-Space Pseudospectral Time Domain Models of Acoustic Propagation

Year: 2025

Type: article

Abstract: Non-uniform time stepping in acoustic propagation models can be used to preserve accuracy or reduce computational cost for an acoustic simulation with a wave front propagating through a domain with both heterogeneous and homogenous regions, such as for a simulation of breast ultrasound tomography. The k-space correction already exist within the literature to remove numerical dispersion caused by the time stepping procedure in pseudo-spectral time domain models, but requires a uniform time step. Here we expand this correction to be able to account for a non-uniform time stepping method and illustrate the potential advantages and considerations.

Source: Journal of Theoretical and Computational Acoustics

DOI: 10.1142/s2591728525500100

Authors: Matthew J. King, B. E. Treeby, B. T. Cox

Institution: University College London

Language: English

Topic: Ultrasound Imaging and Elastography

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: diamond

Funder: Engineering and Physical Sciences Research Council

Awards: k-Wave: An open-source toolbox for the time-domain simulation of acoustic wave fields, WHOLE-BODY, HIGH RESOLUTION, 3D, SMALL ANIMAL PHOTOACOUSTIC AND ULTRASOUND COMPUTED TOMOGRAPHY SYSTEM