Microwave ablation: Results with double 915MHz antennae in ex vivo bovine Livers
| Autor: | Baowei Dong, Xiaoling Yu, Yang Wang, Wenyuan Shi, Qiujie Shao, Tong Lu, Qiang Zhu, Ping Liang |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Liver surgery
business.industry medicine.medical_treatment Microwave ablation Equipment Design General Medicine Anatomy In Vitro Techniques Ablation Application time Liver Catheter Ablation Animals Medicine Coagulation (water treatment) Cattle Radiology Nuclear Medicine and imaging Power output Microwaves business Ex vivo Biomedical engineering |
| Zdroj: | European Journal of Radiology. 79:214-217 |
| ISSN: | 0720-048X |
| DOI: | 10.1016/j.ejrad.2010.03.015 |
| Popis: | Purpose To investigate the settings for the optimal microwave ablation geometry with the simultaneous application of double 915MHz antennae in ex vivo bovine livers, so as to provide the technical basis for treating large liver tumor in one ablation session. Materials and methods MWAs were performed on ex vivo bovine livers by simultaneously application of double 915MHz internally cooled-shaft antennae. Four power settings (50, 60, 70 and 80W) were used during MWAs, while application time was fixed at 10min. Three inter-antenna distances (2.0, 2.5 and 3.0cm) were used. Diameters and shapes of the coagulation zones were observed on gross specimens. Results (1) The coagulation shape was related to the inter-antenna distance, which was most spherical at an inter-antenna distance of 2.0cm. A recess of the coagulation zone was observed at an inter-antenna distances of 2.5 and 3.0cm. (2) The long-axis and short-axis coagulation diameter enlarged with increasing power output. However, there were no significant differences in the coagulation diameters between 70 and 80W ( P >0.05). More desirable coagulation geometry could be obtained by simultaneous application of double antennae at 70W for 10min with an inter-antenna distance of 2.0cm, the long-axis and short-axis coagulation diameter were 6.95±0.32cm and 5.30±0.22cm, respectively. Conclusion Simultaneous application of double 915MHz antennae can generate large coagulation zones with desirable shape which may be advantageous for treating large liver tumor in one ablation session. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect