Image based simulation for liver tumor ablation by focused ultrasound
Journal
IFMBE Proceedings
Journal Volume
47
Pages
88-91
Date Issued
2015
Author(s)
Abstract
The present computational model is aimed at predicting the temperature field in a region of the hepatic parenchyma with a cancer resulting from applied highintensity focused ultrasounds (HIFU) for thermal ablation of the tumor in a patient-specific geometry. The threedimensional (3D) acoustic–thermal–hydrodynamic coupling model computes the pressure, temperature, and blood velocity fields expressed by the nonlinear Westervelt equation with relaxation effects and bioheat equations in both the hepatic parenchyma and blood vessels (sink). The classical nonlinear Navier–Stokes equations related to mass and momentum conservation in large hepatic blood vessels are employed both for convective cooling and acoustic streaming. This 3D three-field coupling demonstrates that both convective cooling and acoustic streaming change the temperature considerably near large blood vessels. In addition, acoustic streaming cannot be neglected due to resulting velocity magnitude and blood redistribution between different branches. The results presented in the current work can be further used to construct a surgical planning platform. ? Springer International Publishing Switzerland 2015.
Subjects
3D reconstruction; Blood flow; HIFU; Liver tumor
SDGs
Other Subjects
Ablation; Acoustic fields; Acoustic streaming; Biochemical engineering; Biomedical engineering; Blood; Computational geometry; Cooling; Navier Stokes equations; Nonlinear equations; Tumors; Ultrasonics; Velocity; 3D reconstruction; Blood flow; HIFU; High intensity focused ultrasound; Hydrodynamic coupling; Image-based simulations; Liver tumors; Momentum conservations; Blood vessels
Type
conference paper