2026-04-17T11:52:54Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4184752026-02-04T05:59:07Zcom_2072_1033col_2072_452950

A pseudo-spectral time-domain method for ultrasound wave propagation in soft biological tissue Spa, Carlos Puente, Josep de la Barcelona Supercomputing Center Àrees temàtiques de la UPC::Informàtica::Aplicacions de la informàtica::Aplicacions informàtiques a la física i l‘enginyeria Pseudo-spectral methods Acoustic waves Power-law absorption Ultrasound frequencies We introduce a Pseudo-Spectral Time-Domain (PSTD) method to simulate acoustic wave propagation in soft biological tissues, incorporating frequency-dependent power-law absorption and dispersion. A comprehensive Von-Neumann stability analysis highlights the influence of material parameters, time step, and spatial discretization on numerical stability. Validation is conducted through one-dimensional tests comparing numerical results with theoretical predictions for dispersion and attenuation, and two-dimensional simulations benchmarked against analytical Green's functions. Additionally, forward simulations on a breast phantom model using typical ultrasound parameters demonstrate the method's accuracy in modeling wave attenuation and dispersion. This PSTD method provides a reliable and efficient computational tool for advanced biomedical ultrasonics research. The research leading to these results has received funding from the QUSTom project with proposal no. 101046475 under the call HORIZON-EIC-2021-PATHFINDEROPEN-01. Peer Reviewed Postprint (published version) 2025-01-15 Article Spa, C.; Puente, J. de la. A pseudo-spectral time-domain method for ultrasound wave propagation in soft biological tissue. "Journal of Computational Physics", 15 Gener 2025, vol. 521, 113527. 0021-9991 1090-2716 https://hdl.handle.net/2117/418475 10.1016/j.jcp.2024.113527 eng https://www.sciencedirect.com/science/article/pii/S0021999124007757 info:eu-repo/grantAgreement/EC/HE/101046475/EU/Quantitative Ultrasound Stochastic Tomography/QUSTom http://creativecommons.org/licenses/by/4.0/ Open Access Attribution 4.0 International application/pdf Elsevier