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Application of Laparoscopic Hepatectomy Combined with Intraoperative Microwave Ablation in Colorectal Cancer Liver Metastasis
Published on: March 3, 2023
A floating sleeve antenna yields localized hepatic microwave ablation
Deshan Yang1, John M Bertram, Mark C Converse
1Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI 53706 USA.
IEEE Transactions on Bio-Medical Engineering
|March 15, 2006
Summary
We developed a new microwave ablation antenna with a floating sleeve for precise hepatic tumor treatment. This innovation ensures localized heating independent of insertion depth, improving ablation accuracy.
Area of Science:
- Medical Devices
- Biomedical Engineering
- Electromagnetics
Background:
- Hepatic microwave ablation is a key cancer treatment.
- Current devices face challenges with localized heating and insertion depth variability.
- Optimizing antenna design is crucial for effective ablation therapy.
Purpose of the Study:
- To introduce a novel coaxial antenna for hepatic microwave ablation.
- To demonstrate a design that achieves a localized specific absorption rate (SAR) pattern.
- To create an antenna system with insertion depth independence.
Main Methods:
- Design and numerical simulation of a floating sleeve coaxial dipole antenna.
- Utilizing finite element methods for electromagnetic analysis.
- Conducting ex vivo experiments to validate simulation findings.
Main Results:
- The floating sleeve design creates a highly localized SAR pattern.
- Ablation zone localization is independent of antenna insertion depth.
- The antenna exhibits low power reflection within the 2.4-GHz Industrial, Scientific, and Medical (ISM) band.
Conclusions:
- The novel floating sleeve coaxial antenna offers precise control over microwave heating in hepatic ablation.
- This design overcomes insertion depth limitations, enhancing treatment efficacy.
- The antenna shows promise for improved microwave ablation procedures.
