电介质
微波食品加热
人肺
肺
生物医学工程
医学
材料科学
病理
内科学
光电子学
计算机科学
电信
作者
Audrey L. Evans,Darya Buehler,Jefree J. Schulte,Daniel P. McCarthy,Susan C. Hagness
出处
期刊:Biomedical Physics & Engineering Express
[IOP Publishing]
日期:2024-08-05
卷期号:10 (5): 055027-055027
标识
DOI:10.1088/2057-1976/ad6b32
摘要
Abstract Technological development of microwave treatment and detection techniques for lung cancer requires accurate and comprehensive knowledge of the microwave dielectric properties of human lung tissue. We characterize the dielectric properties of room temperature human lung tissue from 0.5 to 10 GHz for three lung tissue groups: normal, fibroelastotic, and malignant. We fit a two-pole Debye model to the measured frequency-dependent complex permittivity and calculate the median Debye parameters for the three groups. We find that malignant lung tissue is approximately 10% higher in relative permittivity and conductivity compared to normal lung tissue; this trend matches previously reported normal versus malignant data for other biological tissues. There is little contrast between benign lung tissue with fibroelastosis and malignant lung tissue. We extrapolate our data from room temperature to 37 °C using a temperature-dependence model for animal lung tissue and use the Maxwell-Garnett dielectric mixing model to predict the dielectric properties of inflation-dynamic human lung tissue; both approximations correspond with previously reported dielectric data of bovine and porcine lung tissue.
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