On the matching medium for microwave-based medical diagnosis

Lui, HS; Fhager, A

On the matching medium for microwave-based medical diagnosis

Lui, HS Fhager, A

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Publisher:: IOP Publishing
Publication Type:: Journal Article
Citation:: Biomedical Physics and Engineering Express, 2018, 4, (3), pp. 035015
Issue Date:: 2018-03-16

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Field	Value	Language
dc.contributor.author	Lui, HS
dc.contributor.author	Fhager, A
dc.date.accessioned	2022-11-02T04:44:09Z
dc.date.available	2022-11-02T04:44:09Z
dc.date.issued	2018-03-16
dc.identifier.citation	Biomedical Physics and Engineering Express, 2018, 4, (3), pp. 035015
dc.identifier.issn	2057-1976
dc.identifier.issn	2057-1976
dc.identifier.uri	http://hdl.handle.net/10453/163158
dc.description.abstract	In microwave-based medical diagnosis, reflections of electromagnetic waves from the air-skin interface can be reduced with a proper choice of matching medium such that electromagnetic radiation can be effectively penetrated into and through human bodies. Due to the heterogeneous and lossy nature of tissue and the fact that the electromagnetic problem varies as a function of matching medium, frequency, incident angles and polarization, it is not trivial to analyze the entire propagation phenomena. In this study, transmission of electromagnetic wave through a multi-layer planar human tissue model with different matching medium is considered. The reflected, absorbed and transmitted power components are computed to quantify the transmission performance of the matching medium. Our results show that although reflection can be minimized through a proper choice of matching medium, it does not necessary result in an optimal transmission as the transmitted signal is severely attenuated inside the tissue. Our results also show that the oblique incidence plane wave components, which in general correspond to the non-zero spatial frequency components of a near field distribution, can better penetrate through the tissue when a low-permittivity matching medium is used. These findings suggest that a better signal integrity can be obtained when a low-permittivity matching medium (ϵr between 5 and 30) is used.
dc.language	en
dc.publisher	IOP Publishing
dc.relation.ispartof	Biomedical Physics and Engineering Express
dc.relation.isbasedon	10.1088/2057-1976/aa8a89
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0903 Biomedical Engineering, 1004 Medical Biotechnology
dc.title	On the matching medium for microwave-based medical diagnosis
dc.type	Journal Article
utslib.citation.volume	4
utslib.for	0903 Biomedical Engineering
utslib.for	1004 Medical Biotechnology
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2022-11-02T04:44:08Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	4
utslib.citation.issue	3

Abstract:

In microwave-based medical diagnosis, reflections of electromagnetic waves from the air-skin interface can be reduced with a proper choice of matching medium such that electromagnetic radiation can be effectively penetrated into and through human bodies. Due to the heterogeneous and lossy nature of tissue and the fact that the electromagnetic problem varies as a function of matching medium, frequency, incident angles and polarization, it is not trivial to analyze the entire propagation phenomena. In this study, transmission of electromagnetic wave through a multi-layer planar human tissue model with different matching medium is considered. The reflected, absorbed and transmitted power components are computed to quantify the transmission performance of the matching medium. Our results show that although reflection can be minimized through a proper choice of matching medium, it does not necessary result in an optimal transmission as the transmitted signal is severely attenuated inside the tissue. Our results also show that the oblique incidence plane wave components, which in general correspond to the non-zero spatial frequency components of a near field distribution, can better penetrate through the tissue when a low-permittivity matching medium is used. These findings suggest that a better signal integrity can be obtained when a low-permittivity matching medium (ϵr between 5 and 30) is used.

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http://hdl.handle.net/10453/163158