![]() ![]() Loco-regional therapies, such as thermal ablation, have received increased indications for use in neoadjuvant roles, ablation-assisted resection, and for the treatment of unresectable hepatic malignancies. We demonstrate, in an initial phantom experiment, enhanced navigation in image-guided hepatic ablation procedures and identify a clear multiphysics pathway toward a more comprehensive thermal dose planning and deformation-corrected guidance framework. Furthermore, when using sparse-surface data (i.e., as is available in an open surgical procedure), the deformation correction improved registration error by 38.3% and volumetric overlap from 64.8 ± 12.4 % to 77.1 ± 8.0 % for rigid and corrected, respectively. When driving registrations with full organ surface data (i.e., as could be available in a percutaneous procedure suite), the deformation correction method improved average ablation antenna registration error by 58.9% compared to rigid registration (i.e., 2.5 ± 1.1 mm, 5.6 ± 2.3 mm of average target error for corrected and rigid registration, respectively) and on average improved volumetric overlap between the modeled and ground-truth ablation zones from 67.0 ± 11.8 % to 85.6 ± 5.0 % for rigid and corrected, respectively. To achieve this, we employ a simple, retrospective model of microwave ablation after registration, which allows a preliminary evaluation of the combined therapeutic and navigational framework. Furthermore, we present preliminary computational modeling of microwave ablation integrated within the navigational environment to lay the groundwork for a more comprehensive procedural planning and guidance framework. Options->Expressions->Global expressions: rho=(1.5+0.5*tanh(y/0.We compare a surface-driven, model-based deformation correction method to a clinically relevant rigid registration approach within the application of image-guided microwave ablation for the purpose of demonstrating improved localization and antenna placement in a deformable hepatic phantom. Subdomain settings: density “rho”, viscosity “eta” rectangle 10x2 based at (-5,-1) (corner) : New -Model -> Chemical engineering module -> Weakly compressible Navier Stokes - read more inĬhemical engineering module - user’s guide ![]() Verification of the numerical results by Chambat et al. We will focus on the following problem described in Lesson 2 - Chambat boundary conditions () (incompressible Navier Stokes coupled with an ODE) Help Desk -> comsol multiphysics -> Model libraryĬoupling incompressible Navier-Stokes with thermal convection Several examples - Comsol multiphysics module Geophysics cluster: - v3.5a (geof10.), v4.4, v5.1., v5.2 (lojzik only)Įach module comes with extensive documentation: F1->Model library Several modules are available for COMSOL, categorized according to the applications areas Electrical, Mechanical, Fluid, Acoustic, Chemical, Multipurpose, and Interfacing. COMSOL Server is a distinct software for the management of COMSOL simulation applications in companies. Users may use drag-and-drop tools (Form Editor) or programming (Method Editor). An App Builder can be used to develop independent custom domain-specific simulation applications. An API for Java and LiveLink for MATLAB may be used to control the software externally. COMSOL provides an IDE and unified workflow for electrical, mechanical, fluid, acoustics and chemical applications.īeside the classical problems that can be addressed with application modules, the core Multiphysics package can be used to solve PDEs in weak form. It allows conventional physics-based user interfaces and coupled systems of partial differential equations (PDEs). COMSOL Multiphysics is a cross-platform finite element analysis, solver and multiphysics simulation software. ![]()
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