NDLI: Theoretical and experimental study on RF tumor ablation with internally cooled electrodes: When does the roll-off occur?

Content Provider	IEEE Xplore Digital Library
Author	Alba, J. Gonzalez-Suarez, A. Trujillo, M. Berjano, E.
Copyright Year	2011
Description	Author affiliation: Departamento Matemática Aplicada. Instituto Universitario de Matemática Pura y Aplicada, Universidad Politécnica de Valencia, Spain (Trujillo, M.) \|\| Biomedical Synergy, Electronic Engineering Department, Universidad Politécnica de Valencia, Spain (Alba, J.; Gonzalez-Suarez, A.; Berjano, E.)
Abstract	The Cool-tip is one of the most widely employed electrodes in radiofrequency (RF) ablation (RFA) of hepatic tumors. This electrode creates reliable geometry and coagulation zones. Despite the advantages of this electrode, during the ablation is produced a phenomenon called roll-off in which impedance increases, energy deposition completely stops and the lesion size cannot be increased. Consequently, the thermal lesion size is smaller and the tumors which can be ablated are smaller too. In this research we studied theoretical and experimentally the electrical-thermal performance of the Cool-tip electrode during RFA of hepatic tissue. Mainly, we were interested in the occurrence of the roll-off and its relationship with the tissue temperatures around the electrode. The theoretical model included the vaporization of the tissue and the variation of the thermal and electrical conductivities with temperature. The model was solved numerically using COMSOL Multiphysics software. For the experimental part we conducted a study in ex vivo liver tissue. The experimental and theoretical results showed that the roll-off is totally related when temperatures around 100°C surrounds the tissue close to the center of the Cool-tip. The knowledge of this fact brings a powerful tool to analyze alternative methods or techniques to avoid the roll-off.
Starting Page	314
Ending Page	317
File Size	923009
Page Count	4
File Format	PDF
ISBN	9781424441211
ISSN	1557170X
e-ISBN	9781457715891
e-ISBN	9781424441228
DOI	10.1109/IEMBS.2011.6090082
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electrodes Impedance Temperature measurement Radio frequency Liver Conductivity Temperature sensors
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Experimental and theoretical study of an internally cooled bipolar electrode for RF coagulation of biological tissues

Validation of accuracy of liver model with temperature-dependent thermal conductivity by comparing the simulation and in vitro RF ablation experiment

Mathematical modeling of impedance controlled radiofrequency tumor ablation and ex-vivo validation

Temperature dependence of thermal conductivity of liver based on various experiments and a numerical simulation for RF ablation

Modeling bimodal vessel effects on radio and microwave frequency ablation zones

A two-equation coupled system model for determination of liver tissue temperature during radio frequency ablation

Derivation of the relationship between the rate of temperature rise and viscoelasticity for constructing a coagulation model for liver radio frequency ablation

Contribution of Direct Heating, Thermal Conduction and Perfusion during Radiofrequency and Microwave Ablation

Estimation of intraoperative blood flow during liver RF ablation using a finite element method-based biomechanical simulation

Theoretical and experimental study on RF tumor ablation with internally cooled electrodes: When does the roll-off occur?

Similar Documents

Experimental and theoretical study of an internally cooled bipolar electrode for RF coagulation of biological tissues

Validation of accuracy of liver model with temperature-dependent thermal conductivity by comparing the simulation and in vitro RF ablation experiment

Mathematical modeling of impedance controlled radiofrequency tumor ablation and ex-vivo validation

Temperature dependence of thermal conductivity of liver based on various experiments and a numerical simulation for RF ablation

Modeling bimodal vessel effects on radio and microwave frequency ablation zones

A two-equation coupled system model for determination of liver tissue temperature during radio frequency ablation

Derivation of the relationship between the rate of temperature rise and viscoelasticity for constructing a coagulation model for liver radio frequency ablation

Contribution of Direct Heating, Thermal Conduction and Perfusion during Radiofrequency and Microwave Ablation

Estimation of intraoperative blood flow during liver RF ablation using a finite element method-based biomechanical simulation

Theoretical and experimental study on RF tumor ablation with internally cooled electrodes: When does the roll-off occur?