دورية أكاديمية
AC measurements and simulations of hepatic radiofrequency ablation
| العنوان: | AC measurements and simulations of hepatic radiofrequency ablation |
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| المؤلفون: | Chieh-feng Chang, Hsuan-Yu Kuo, Jo-Ping Lee |
| المصدر: | International Journal of Hyperthermia, Vol 38, Iss 1, Pp 1322-1332 (2021) |
| بيانات النشر: | Taylor & Francis Group, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Medical technology |
| مصطلحات موضوعية: | radiofrequency ablation (rfa), alternating current (ac), relative permittivity, dielectric constant, phase, finite element method (fem) simulation, bovine liver, Medical technology, R855-855.5 |
| الوصف: | Introduction The radiofrequency ablation (RFA) of liver cancer is a desirable treatment option, as it is minimally invasive. An accurate numerical simulation can greatly help physicians better plan their surgical protocols. Previously, the displacement current in the RFA process was considered negligible, and therefore RFA simulation was modeled as a direct current (DC) system instead of an alternating current (AC) system. Our study investigated the hypothesis that the displacement current in the RFA process should not always be considered negligible. Methods AC measurements of ex vivo bovine liver ablation were performed, and numerical simulations were also conducted to test the hypothesis that the relative permittivity would significantly decrease after the liver tissue reached a high temperature. Results The displacement current was observed to be a sizable fraction of the conduction current, especially before the onset of the first pause. The simulation results indicated that the relative permittivity is likely to decrease to several hundred or lower at elevated temperatures. Conclusions Our study results suggest that the DC model may be inadequate, especially before the first roll-off and that additional information could be available during RFA treatment by considering the AC nature of RFA, which could lead to improved numerical simulation. Additional measurements of tissue parameters are needed to reach the full potential of the AC model for further development of ablation control. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0265-6736 1464-5157 02656736 |
| Relation: | https://doaj.org/toc/0265-6736; https://doaj.org/toc/1464-5157 |
| DOI: | 10.1080/02656736.2021.1971779 |
| URL الوصول: | https://doaj.org/article/e3b4ce6cff644b8882c7a4fe16951511 |
| رقم الأكسشن: | edsdoj.3b4ce6cff644b8882c7a4fe16951511 |
| قاعدة البيانات: | Directory of Open Access Journals |
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Full Text Finder | تدمد: | 02656736 14645157 |
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| DOI: | 10.1080/02656736.2021.1971779 |