Enhancing the focusing properties of an ellipsoidal beamformer based imaging system: A simulation study

Trichopoulos, GC; Karanasiou, IS; Uzunoglu, NK

dc.contributor.author	Trichopoulos, GC	en
dc.contributor.author	Karanasiou, IS	en
dc.contributor.author	Uzunoglu, NK	en
dc.date.accessioned	2014-03-01T02:44:02Z
dc.date.available	2014-03-01T02:44:02Z
dc.date.issued	2006	en
dc.identifier.issn	05891019	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31631
dc.subject	Antenna Measurement	en
dc.subject	Biological Tissue	en
dc.subject	Focal Point	en
dc.subject	Imaging System	en
dc.subject	Microwave Radiometry	en
dc.subject	Simulation Study	en
dc.subject	Area of Interest	en
dc.subject.other	Beamformers	en
dc.subject.other	Focusing properties	en
dc.subject.other	Human head	en
dc.subject.other	Microwave radiometry tomography systems	en
dc.subject.other	Finite element method	en
dc.subject.other	Focusing	en
dc.subject.other	Imaging systems	en
dc.subject.other	Microwaves	en
dc.subject.other	Radiometry	en
dc.subject.other	Thermal conductivity	en
dc.subject.other	Tissue	en
dc.subject.other	Tomography	en
dc.subject.other	Beamforming	en
dc.title	Enhancing the focusing properties of an ellipsoidal beamformer based imaging system: A simulation study	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/IEMBS.2006.260606	en
heal.identifier.secondary	http://dx.doi.org/10.1109/IEMBS.2006.260606	en
heal.identifier.secondary	4029865	en
heal.publicationDate	2006	en
heal.abstract	Aim of this study is the improvement of the focusing properties of a microwave radiometry tomography system, used for the imaging of the product of temperature and conductivity in biological tissues via contactless measurements. The operation principle of the device in question is based on an ellipsoidal conductive wall cavity, which provides the required beamforming and focusing. The biological tissue under measurement is placed on one of the two focal points whereas on the other one, a dipole antenna measures the black body type radiation emitted from the head's tissue. In the framework of the present research several approaches are followed in order to improve and optimize the system's focusing properties on the tissue area of interest. Extensive simulations using a commercial FEM tool are performed in a wide range of operation frequencies. Dielectric spheres of various electromagnetic characteristics are placed either around the source (human head model) or the receiver (dipole antenna) in order to improve the matching on the head-air interface. The ability of focusing the electromagnetic energy in specific areas inside the human head is herein investigated in detail and further discussed. © 2006 IEEE.	en
heal.journalName	Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings	en
dc.identifier.doi	10.1109/IEMBS.2006.260606	en
dc.identifier.volume	1	en
dc.identifier.spage	5097	en
dc.identifier.epage	5100	en