Effect of 433 MHz double-slot microwave antennas for double-zone ablation in ex vivo swine liver experiment
Xiaofei Jin, Mengwei Jiang, Lu Qian, Ling Tao, Yamin Yang, Lidong Xing, Zhiyu Qian, Weitao Li, Muhammad Zubair, Muhammad Zubair, Muhammad Zubair
TL;DR
This study tests how the design of 433 MHz microwave antennas affects the shape and size of tissue ablation in pig livers, showing new controllable ablation patterns.
Contribution
The study introduces a new 433 MHz double-slot microwave antenna design that creates controllable, gourd-shaped ablation zones in liver tissue.
Findings
Longer axial length and slot-to-slot distance produced gourd-shaped ablation zones.
Shorter antennas resulted in guitar-shaped ablation patterns in liver tissue.
Ablation shapes matched simulation predictions in ex vivo experiments.
Abstract
To evaluate the effects of axial length and slot-to-slot distance of double-slot microwave antenna (DSMA) with frequency of 433 MHz on the size and shape of ablation zones created under different input microwave powers. The design of double slot microwave antennas (DSMAs) with axial lengths (70 mm, 30 mm) and slot-to-slot distance (49 mm, 10 mm) were optimized by numerical simulation and ex vivo liver experiments. Finite-element method simulations and forty ablations of swine liver were employed to obtain the temperature distributions within liver tissue using DSMAs at the 433 MHz operating frequency in a range of heating powers (20, 30, 40 and 50W) for 600 s. The dependence of the effectiveness of MWA on the axial length and slot-to-slot distance of antenna as well as the input power was further evaluated by analyzing morphologic characteristics of ablated zone. Two-zone ablation was…
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Taxonomy
TopicsUltrasound and Hyperthermia Applications · Hepatocellular Carcinoma Treatment and Prognosis · Microbial Inactivation Methods