Modelado por computador de termocoagulación por radiofrecuencia (RF-TC) usando electrodos de mapeo intracerebral implantados para estereoelectroencefalografía (SEEG)

S. COLLAVINI; J. J. PÉREZ; E. BERJANO; M. FERNANDEZ-CORAZZA; S. ODDO; R. M. IRASTORZA

Cartagena

Congreso; XLI Congreso Anual de la Sociedad Española de Ingeniería Biomédica (CASEIB 2023); 2023

Universidad Politécnica de Cartagena y la Sociedad Española de Ingeniería Biomédica (SEIB)

Background: Our objective was to use computational modeling to provide a full and comprehensible physical description of the electrical and thermal behavior during electroencephalography-guided (SEEG) radiofrequency thermocoagulation (RF-TC), a minimally invasive procedure to destroy epileptic foci in the brain.Methods: We used the Finite Element Method to solve a coupled electrical-thermal problem and obtain the temperature distributions in the tissue during RF-TC. The computer model was first validated using an ex vivo model based on liver fragments, and later used to study the impact of the tissue surrounding the contacts (grey matter vs. white matter) on the coagulation zone created.Results: The model was able to predict reasonably well both the impedance evolution and the short diameter of the coagulation zone (error < 0.01 mm), but overestimated the long diameter in 23 mm.