Meshfree simulations of ultrasound vector flow imaging using smoothed particle hydrodynamics.

Meshfree simulations of ultrasound vector flow imaging using smoothed particle hydrodynamics. Phys Med Biol. 2018 Sep 24;: Authors: Shahriari S, Garcia D Abstract Before embarking on a series of <i>in vivo</i> tests, design of ultrasound-flow-imaging modalities are generally more efficient through computational models as multiple configurations can be tested methodically. To that end, simulation models must generate realistic blood flow dynamics and Doppler signals. The current <i>in silico</i> ultrasound simulation techniques suffer mainly from uncertainty in providing accurate trajectories of moving ultrasound scatterers. In mesh-based Eulerian methods, numerical truncation errors from the interpolated velocities, both in the time and space dimensions, can accumulate-late significantly and make the pathlines unreliable. These errors can distort beam-to-beam inter-correlation present in ultrasound flow imaging. It is thus a technical issue to model a correct motion of the scatterers by considering their interaction with boundaries and neighboring scatterers. We hypothesized that <i>in silico</i> analysis of emerging ultrasonic imaging modalities can be implemented more accurately with meshfree. We developed an original fluid-ultrasound simulation environment based on a meshfree Lagrangian CFD (computational fluid dynamics) formulation, which allows a...
Source: Physics in Medicine and Biology - Category: Physics Authors: Tags: Phys Med Biol Source Type: research