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September 5, 2025BioengineeringOpen Access

Experimental Validation of Time-Explicit Ultrasound Propagation Models with Sound Diffusivity or Viscous Attenuation in Biological Tissues Using COMSOL Multiphysics

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Attenuation is primarily influenced by bulk viscosity, especially in fluid-rich tissues like liver and myocardium.
The power-law model provided the best fit for attenuation metrics across a frequency range of 0.5 to 5 MHz.
This study utilizes a time-explicit solver to accurately represent ultrasound propagation without frequency-domain simplifications.
Findings highlight the need for alternative modeling for tissues like cartilage and brain that exhibit weaker viscous responses.

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Experimental integration of sound diffusivity and viscous attenuation in biological tissues shows improved ultrasound modeling.

Fernandes et al. (2025) studied this question.

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