ArticleInternational journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group2026
Dielectric properties, thermal properties, blood perfusion rate: which biophysical parameter is the leading source of variability of microwave ablation models in lung?
Article in International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe large variability in outcomes following microwave ablation (MWA) of pulmonary tumors highlights a need for quantitative methods to assess 3D temperature profiles accounting for tissue-specific biophysical characteristics. The goal of this study is to identify the least and most influential biophysical parameters on the ablation zone.
methodsA computational bioheat transfer model was built to simulate a 2.45 GHz microwave applicator positioned within a 2 cm diameter tumor. Simulations were conducted using 60 W - 10 min energy settings and considering low and high values of: 1) relative permittivity, 28.3-50.4 and effective conductivity, 1.0-1.9 (Sm
resultsThe variabilities in the volumetric heat capacity and blood perfusion rate at the tumor-lung parenchyma boundary yield differences between 5.7 - 11.4% (TM5), 3.1-4.6 mm (D
conclusionThermal properties and blood perfusion between tumor and surrounding tissue are the most impactful parameters on achieving adequate treatment margin following lung MWA. This quantitative analysis provides insight on the tissue biophysical properties that warrant deeper experimental assessment in order to inform treatment planning of lung MWA.
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