The use of left handed materials for the optimization of the focusing attributes of a biomedical hybrid system

Karathanasis, KT; Gouzouasis, IA; Karanasiou, IS; Uzunoglu, NK

dc.contributor.author	Karathanasis, KT	en
dc.contributor.author	Gouzouasis, IA	en
dc.contributor.author	Karanasiou, IS	en
dc.contributor.author	Uzunoglu, NK	en
dc.date.accessioned	2014-03-01T02:46:33Z
dc.date.available	2014-03-01T02:46:33Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32710
dc.subject	Focused microwave radiometry	en
dc.subject	Hyperthermia treatment	en
dc.subject	Left handed materials	en
dc.subject	Temperature and conductivity variations	en
dc.subject.other	Beam formers	en
dc.subject.other	Biomedical applications	en
dc.subject.other	Brain activation	en
dc.subject.other	Ellipsoidal cavity	en
dc.subject.other	Extensive simulations	en
dc.subject.other	Focal points	en
dc.subject.other	Focused microwave radiometry	en
dc.subject.other	Focusing properties	en
dc.subject.other	Head model	en
dc.subject.other	Human bodies	en
dc.subject.other	Human brain	en
dc.subject.other	Human head model	en
dc.subject.other	Hyperthermia treatment	en
dc.subject.other	Left handed materials	en
dc.subject.other	Low loss	en
dc.subject.other	Main module	en
dc.subject.other	Matching layer	en
dc.subject.other	Measurement techniques	en
dc.subject.other	Microwave radiometry	en
dc.subject.other	Relative movement	en
dc.subject.other	Spatial sensitivity	en
dc.subject.other	Temperature variation	en
dc.subject.other	Electric fields	en
dc.subject.other	Electric inverters	en
dc.subject.other	Electromagnetic compatibility	en
dc.subject.other	Focusing	en
dc.subject.other	Hybrid materials	en
dc.subject.other	Hybrid systems	en
dc.subject.other	Hyperthermia therapy	en
dc.subject.other	Lithium batteries	en
dc.subject.other	Metamaterials	en
dc.subject.other	Microwaves	en
dc.subject.other	Plastic molds	en
dc.subject.other	Radiometers	en
dc.subject.other	Radiometry	en
dc.subject.other	Simulators	en
dc.subject.other	Temperature distribution	en
dc.subject.other	Dielectric materials	en
dc.title	The use of left handed materials for the optimization of the focusing attributes of a biomedical hybrid system	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/EMCEUROPE.2009.5189679	en
heal.identifier.secondary	5189679	en
heal.identifier.secondary	http://dx.doi.org/10.1109/EMCEUROPE.2009.5189679	en
heal.publicationDate	2009	en
heal.abstract	Microwave radiometry is a measurement technique that has been used to provide temperature distributions inside the human body. In this context, radiometry has several biomedical applications. Specifically, among others, it can be used to provide temperature control during hyperthermia sessions and detection of temperature variations inside the human brain during brain activation. A novel system able to provide microwave radiometry measurements and hyperthermia treatment has been developed by our group in the past few years. Its main module is an ellipsoidal cavity acting as a beamformer providing the necessary focusing. The cavity is used in conjunction with sensitive radiometric receivers and magnetron generators during microwave radiometry and hyperthermia respectively. In this paper, ways to improve the system's focusing properties are examined throughout extensive simulation analysis. In particular, low loss dielectric materials are used to fill the cavity's volume in conjunction with left handed materials used as matching layers around a human head model. Results have shown enhancement of the detection/penetration depth of the electric field inside the human head model as well as improvement of the system's spatial sensitivity in relative movements of the head model around the ellipsoidal's focal point. © 2009 IEEE.	en
heal.journalName	2009 International Symposium on Electromagnetic Compatibility - EMC Europe	en
dc.identifier.doi	10.1109/EMCEUROPE.2009.5189679	en