Heat-transfer performance of single-needle multi-point microwave ablation: A study on coagulation zone and temperature distribution

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2026-06-01 Epub Date: 2026-03-12 DOI:10.1016/j.icheatmasstransfer.2026.111015

Qi Wang , Shuicai Wu , Luyu Li , Hongjian Gao , Weiwei Wu

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Abstract

Purpose

This study focuses on the heat-transfer performance of single-needle multi-point microwave ablation (MWA), emphasizing the effects on the coagulation zone and the temperature distribution. The objective is to clarify the heat transfer and energy diffusion characteristics during the ablation of large liver tumors (>3 cm).

Materials and methods

A finite element-based numerical simulation model of single-needle multi-point MWA was established and validated using ex vivo porcine liver experiments. Different time-allocation schemes (2 min–6 min, 4 min–4 min) and pull-back distances (5 mm, 10 mm) were investigated to analyze their influence on heat transfer and thermal field evolution. Statistical analyses of parameter effects were performed using the t-test (p < 0.05).

Results

The single-needle multi-point ablation approach effectively enhanced overall heat transfer and produced a larger, more uniform coagulation zone. Pull-back distance had a significant impact (p < 0.05) on the longitudinal temperature and coagulation morphology, with longer distances generating extended thermal fields. Under a fixed total ablation time, the time-allocation scheme has a relatively minor impact on the heat transfer process.

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单针多点微波烧蚀的传热性能：混凝区及温度分布的研究

目的研究单针多点微波烧蚀（MWA）的传热性能，重点研究其对混凝区和温度分布的影响。目的是阐明大肝肿瘤（> 3cm）消融过程中的传热和能量扩散特征。材料与方法建立了基于有限元的单针多点MWA数值模拟模型，并通过离体猪肝实验进行了验证。研究了不同的时间分配方案（2 min - 6 min, 4 min - 4 min）和回拉距离（5 mm, 10 mm）对换热和热场演化的影响。参数效应的统计分析采用t检验（p < 0.05）。结果单针多点烧蚀能有效增强整体换热，产生更大、更均匀的混凝区。拉离距离对纵向温度和凝固形态有显著影响（p < 0.05），拉离距离越远，热场越宽。在总烧蚀时间一定的情况下，时间分配方案对换热过程的影响较小。

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.