The inverse problem of a passive multiband microwave intracranial imaging method

Karanasiou, IS; Uzunoglu, NK

dc.contributor.author	Karanasiou, IS	en
dc.contributor.author	Uzunoglu, NK	en
dc.date.accessioned	2014-03-01T02:43:35Z
dc.date.available	2014-03-01T02:43:35Z
dc.date.issued	2005	en
dc.identifier.issn	05891019	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31486
dc.subject	Brain imaging	en
dc.subject	Inverse problem	en
dc.subject	Microwave multiband radiometry	en
dc.subject.other	Brain imaging	en
dc.subject.other	Broadband antenna	en
dc.subject.other	Cortex conductivity	en
dc.subject.other	Frequency receivers	en
dc.subject.other	Microwave Radiometry Imaging System (MiRaIS)	en
dc.subject.other	Brain	en
dc.subject.other	Imaging systems	en
dc.subject.other	Inverse problems	en
dc.subject.other	Medical imaging	en
dc.subject.other	Microwaves	en
dc.subject.other	Radiometry	en
dc.subject.other	Signal receivers	en
dc.subject.other	Biomedical engineering	en
dc.title	The inverse problem of a passive multiband microwave intracranial imaging method	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/IEMBS.2005.1616754	en
heal.identifier.secondary	http://dx.doi.org/10.1109/IEMBS.2005.1616754	en
heal.identifier.secondary	1616754	en
heal.publicationDate	2005	en
heal.abstract	A novel Microwave Radiometry Imaging System (MiRaIS) has been developed and experimentally tested for feasible brain activation ""remote"" imaging via contactless measurements. The technique implemented, is focused microwave radiometry with the use of an ellipsoidal conductive wall cavity for focusing and a sensitive radiometric receiver for the detection of the brain conductivity and temperature variation. All system attributes in terms of spatial resolution and detection depth have been theoretically calculated. Phantom experimentation as well as human tests using single frequency receivers, have shown promising outcome concerning the potential clinical value of the proposed system, which seems to be able to pick-up brain activation, possibly caused by cortex conductivity changes. Following this research, a four-frequency radiometric receiver with a broadband antenna operating within the range 1.3-3. 1GHz has been recently developed. In the present paper, a method for retrieving the conductivity variation profile detected in the above mentioned frequencies is discussed. The inverse problem solution is in detail addressed and indicative measurements are used for the validation of the solution in question. The latter represents the estimation of the conductivity variation of cortical areas, corresponding to the detection depth and spatial resolution predicted by the forward problem solution. © 2005 IEEE.	en
heal.journalName	Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings	en
dc.identifier.doi	10.1109/IEMBS.2005.1616754	en
dc.identifier.volume	7 VOLS	en
dc.identifier.spage	1642	en
dc.identifier.epage	1645	en