Adaptive Microwave Ablation System for Localized Tumor Treatment

Though microwave ablation (MWA) technology has shown obvious advantages, it has the problem that the ablation zone is not sufficiently localized. As a result, normal tissue might be inevitably damaged during the ablation process. To solve this problem, the comprehensive MWA theory is first analyzed...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2023-07, Vol.71 (7), p.3114-3125
Main Authors: Wang, Li, Bao, Xiue, Liu, Changbin, Wang, Yafei, Si, Liming, Schreurs, Dominique, Zhang, Anxue
Format: Article
Language:English
Subjects:
Ablation
Adaptive systems
Antennas
Damage localization
Electromagnetic heating
Electromagnetic properties
Frequency-adaptive optimization method
Helical antennas
Liver
localized ablation zone
microwave ablation (MWA)
Microwave antennas
Microwave theory and techniques
Optimization
Production costs
tumor treatment
Tumors
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Summary:Though microwave ablation (MWA) technology has shown obvious advantages, it has the problem that the ablation zone is not sufficiently localized. As a result, normal tissue might be inevitably damaged during the ablation process. To solve this problem, the comprehensive MWA theory is first analyzed in this article, and then, a frequency-adaptive ablation approach is proposed and verified by simulations. Accordingly, a frequency-adaptive MWA system for optimizing the ablation zone is developed. As the tissue's electromagnetic properties change with the increase in temperature during the ablation, the proposed system is designed to monitor the working performance of the antenna in real time and to automatically select the optimum working frequency, simultaneously. The ablation-controlling system is designed as an integrated controller so that the overall size and fabrication cost are obviously reduced. Preliminary validation experiments are performed on the system, which shows that the proposed system is capable of delivering stable power output from 0.5 to 3 GHz and creating a highly localized ablation zone. The proposed MWA system is expected to be a dedicated device for the treatment of tumors.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2023.3236964