Broadband lung dielectric properties over the ablative temperature range: Experimental measurements and parametric models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F19%3A00333023" target="_blank" >RIV/68407700:21230/19:00333023 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1002/mp.13704" target="_blank" >https://doi.org/10.1002/mp.13704</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/mp.13704" target="_blank" >10.1002/mp.13704</a>

Result language

angličtina

Original language name

Broadband lung dielectric properties over the ablative temperature range: Experimental measurements and parametric models

Original language description

Computational models of microwave tissue ablation are widely used to guide the development of ablation devices, and are increasingly being used for the development of treatment planning and monitoring platforms. Knowledge of temperature-dependent dielectric properties of lung tissue is essential for accurate modeling of microwave ablation (MWA) of the lung. We employed the open-ended coaxial probe method, coupled with a custom tissue heating apparatus, to measure dielectric properties of ex vivo porcine and bovine lung tissue at temperatures ranging between 31 and 150 urn:x-wiley:00942405:media:mp13704:mp13704-math-0007C, over the frequency range 500 MHz to 6 GHz. Furthermore, we employed numerical optimization techniques to provide parametric models for characterizing the broadband temperature-dependent dielectric properties of tissue, and their variability across tissue samples, suitable for use in computational models of microwave tissue ablation. Rapid decreases in both relative permittivity and effective conductivity were observed in the temperature range from 94 to 108 urn:x-wiley:00942405:media:mp13704:mp13704-math-0008C. Over the measured frequency range, both relative permittivity and effective conductivity were suitably modeled by piecewise linear functions [root mean square error (RMSE) = 1.0952 for permittivity and 0.0650 S/m for conductivity]. Detailed characterization of the variability in lung tissue properties was provided to enable uncertainty quantification of models of MWA. The reported dielectric properties of lung tissue, and parametric models which also capture their distribution, will aid the development of computational models of microwave lung ablation.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20601 - Medical engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Medical Physics

ISSN

0094-2405

e-ISSN

2473-4209

Volume of the periodical

—

Issue of the periodical within the volume

July

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

4291-4303

UT code for WoS article

000481397500001

EID of the result in the Scopus database

2-s2.0-85070292833