Radiofrequency ablation with four electrodes as a building block for matrix radiofrequency ablation: Ex vivo liver experiments and finite element method modelling. Influence of electric and activation mode on coagulation size and geometry.

Purpose: Radiofrequency ablation (RFA) is increasingly being used to treat unresectable liver tumors. Complete ablation of the tumor and a safety margin is necessary to prevent local recurrence. With current electrodes, size and shape of the ablation zone are highly variable leading to unsatisfactory local recurrence rates, especially for tumors >3 cm.

A piecewise function of resistivity of liver: determining parameters with finite element analysis of radiofrequency ablation.

Radiofrequency ablation (RFA) is a widely used thermal treatment for liver tumors. Knowledge about the resistivity of liver is a prerequisite for the predictability of producible thermo-necrosis with RFA. Most research to date has focused on performing specific experiments to determine the resistivity of a given liver.

A methodology for constraining power in finite element modeling of radiofrequency ablation.

Radiofrequency ablation (RFA) is a minimally invasive thermal therapy for the treatment of cancer, hyperopia, and cardiac tachyarrhythmia. In RFA, the power delivered to the tissue is a key parameter. The objective of this study was to establish a methodology for the finite element modeling of RFA with constant power.