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Comparison of Ablation Zone Between 915- and 2,450-MHz Cooled-Shaft Microwave Antenna: Results in In Vivo Porcine Livers

¹ Department of Ultrasound, The General Hospital of PLA, 28 Fuxing Rd., Beijing 100853, China.
² Present address: Department of Ultrasound, The General Hospital of Jinan Military Region, Shandong, China.

OBJECTIVE. The objective of our study was to compare the ablation zones of two cooled-shaft microwave antennae—one operating at 915 MHz and one operating at 2,450 MHz—in in vivo porcine livers.

CONCLUSION. The 915-MHz cooled-shaft microwave antenna can lead to deeper penetration of liver tissue and can yield a significantly larger ablation zone than the 2,450-MHz cooled-shaft antenna in in vivo porcine livers. In light of the result, 915-MHz cooled-shaft microwaves may be more effective for tumor ablation, especially for large tumors.

Keywords: animal studies • liver tumor ablation • microwave ablation • radiofrequency ablation • thermal ablation therapy

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