Three-dimensional finite-element analyses for radio-frequency hepatic tumor ablation

Tungjitkusolmun, S.; Staelin, S.T.; Haemmerich, Dieter; Tsai, Jang-Zern; Cao, Hong; Webster, John G.; Lee, F.T.; Mahvi, David M.; Vorperian, Vicken R.

doi:10.1109/10.972834

Cited by 297 publications

(195 citation statements)

References 21 publications

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“…Since there is no tissue perfusion in swine liver in in vitro experiments, we exclude parameters for blood perfusion from FE models. Location of the targeted liver tumor in relation to large blood vessels can also change the dimensions, as well as characteristics of resulted coagulation zones [34]. A nonuniform heating MW ablation system might be beneficial to properly ablated both regions close to large blood vessels (more heat) and those that are further away(less heat).…”

Section: Discussionmentioning

confidence: 99%

The Effect of Slot Sizes on Non-Asymmetry Slot Antennafor Microwave Coagulation Therapy

Wongtrairat¹,

Phasukkit²,

Tungjitkusolmun³

et al. 2011

IJBBB

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Abstract-This paper presents analyses of non-asymmetry antenna configuration for microwave ablation at 2450 MHz using three-dimensional finite element analyses. Treatment of hepatic cancer often requires removal or destruction. Using coaxial-slot antenna is opened slot at one-side of antenna. We study the characteristics of various slot size and various power for non-asymmetry structure antenna to observe temperature distributions and SAR. The results illustrate that the coaxial-slot non-asymmetry structure antenna can be used in microwave ablation for destruction of the cancer cell in the area closed to the very fragile tissue or blood vessel.Index Terms-Microwave(MW) ablation, finite-element(FE) analysis, non-asymmetry structure antenna.

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Section: Discussionmentioning

confidence: 99%

The Effect of Slot Sizes on Non-Asymmetry Slot Antennafor Microwave Coagulation Therapy

Wongtrairat¹,

Phasukkit²,

Tungjitkusolmun³

et al. 2011

IJBBB

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“…They range from simple geometric models that use ellipsoids to describe the necrosis [11] over time dependent PDE models with constant coefficients [13,16] to complex models that take cell water evaporation and temperature dependent material parameters into account [14,15,17]. Some authors exploit rotational symmetry around the applicator axis [12], which is of course impossible if the aim is to consider patient individual vascular systems.…”

Section: 1)mentioning

confidence: 99%

“…The way in which vascular cooling is taken into account varies considerably: Simple models use heuristics to quantify the cooling effects [11] or do not consider patient individual vascular systems at all [12]. More advanced approaches model individual vessels by a fixed heat sink [13,14], and some authors even take blood flow together with heat exchange between vessel and tissue into account [15][16][17]. For a comprehensive review, see the overview article by Berjano [18].…”

Section: Introductionmentioning

confidence: 99%

Fast Estimation of the Vascular Cooling in RFA Based on Numerical Simulation

Kröger¹,

Pätz²,

Altrogge³

et al. 2010

TOBEJ

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Abstract:We present a novel technique to predict the outcome of an RF ablation, including the vascular cooling effect. The main idea is to separate the problem into a patient independent part, which has to be performed only once for every applicator model and generator setting, and a patient dependent part, which can be performed very fast. The patient independent part fills a look-up table of the cooling effects of blood vessels, depending on the vessel radius and the distance of the RF applicator from the vessel, using a numerical simulation of the ablation process. The patient dependent part, on the other hand, only consists of a number of table look-up processes. The paper presents this main idea, along with the required steps for its implementation. First results of the computation and the related ex-vivo evaluation are presented and discussed. The paper concludes with future extensions and improvements of the approach.

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“…The details of the FEM and its implementation for bioelectromagnetic problems are available. [74][75][76][77][78][79][80][81][82][83][84][85][86] …”

Section: Iib Modeling Power Depositionmentioning

confidence: 99%

Thermal Therapy, Part IV: Electromagnetic and Thermal Dosimetry

Habash

Bansal

Krewski

et al. 2007

Crit Rev Biomed Eng

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ABSTRACT:In this article some of the important techniques in electromagnetic (EM) and thermal dosimetry are reviewed. Three major areas are discussed: modeling power deposition and estimation of EM energy absorbed by tissues exposed to EM radiation, electrical-thermal modeling for thermal therapy with various models of heat transfer in living tissues, and thermal dosimetry using invasive and noninvasive thermometry. Knowledge about the temperature distributions achieved can only be obtained by treatment planning of patient therapy. This process is called thermal therapy planning system (TTPS), which is a large and complex system for design, control, documentation, and evaluation of the treatment that also provides data for treatment optimization. Various imaging techniques for guidance and monitoring necessary for clinical treatments are also discussed. The review concludes by suggesting future avenues for investigations.

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Three-dimensional finite-element analyses for radio-frequency hepatic tumor ablation

Cited by 297 publications

References 21 publications

The Effect of Slot Sizes on Non-Asymmetry Slot Antennafor Microwave Coagulation Therapy

The Effect of Slot Sizes on Non-Asymmetry Slot Antennafor Microwave Coagulation Therapy

Fast Estimation of the Vascular Cooling in RFA Based on Numerical Simulation

Thermal Therapy, Part IV: Electromagnetic and Thermal Dosimetry

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