2007
DOI: 10.1109/tbme.2007.890740
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Expanding the Bioheat Equation to Include Tissue Internal Water Evaporation During Heating

Abstract: We propose a new method to study high temperature tissue ablation using an expanded bioheat diffusion equation. An extra term added to the bioheat equation is combined with the specific heat into an effective (temperature dependent) specific heat. It replaces the normal specific heat term in the modified bioheat equation, which can then be used at temperatures where water evaporation is expected to occur. This new equation is used to numerically simulate the microwave ablation of bovine liver and is compared t… Show more

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Cited by 208 publications
(196 citation statements)
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“…Most RFA theoretical models have used a constant value for k [14,15,17,[20][21][22], probably due to the fact that changes in k with temperature are not so marked as in  [10,23].…”
Section: Temperature-dependence Of Thermal Conductivity (K)mentioning
confidence: 99%
See 1 more Smart Citation
“…Most RFA theoretical models have used a constant value for k [14,15,17,[20][21][22], probably due to the fact that changes in k with temperature are not so marked as in  [10,23].…”
Section: Temperature-dependence Of Thermal Conductivity (K)mentioning
confidence: 99%
“…The bioheat equation [26] was used as the governing equation of the thermal problem. The enthalpy method [13,25] was considered to modify the bioheat equation and hence to incorporate the phase change [22,27] as follows:…”
Section: Description Of the Model Of Rf Hepatic Ablationmentioning
confidence: 99%
“…It was present in all ablations and corresponded to the region where vaporized water condensed after being driven from the ablation center [26][27][28]. Profiles were not extended to the ablation center, but the most critical region of the ablation to investigate was the region of low modulus contrast, i.e.…”
Section: Discussionmentioning
confidence: 99%
“…Rather, each profile was drawn perpendicular between the outer transition zone boundary in the indented, unstained image and the outer edge of the stained "ring" within the white zone of the ablation in the registered, stained image. The ring corresponded to the boundary where water condensed after being driven from the dehydrated ablation core and will be referred to as the condensation boundary [26][27][28]. The profile distance was normalized for all samples to show average changes between these landmarks.…”
Section: Image Analysismentioning
confidence: 99%
“…We have, however, seriously considered doing so, and have studied the issue in depth. We found three main strategies in the literature to simulate evaporation [63,98,103]. Every model has its advantages and inconveniences [104].…”
Section: Fem Modellingmentioning
confidence: 99%