Analysis of focusing of pulsed baseband signals inside a layered tissue medium

Nikita, KS; Mitsis, GD; Uzunoglu, NK

dc.contributor.author	Nikita, KS	en
dc.contributor.author	Mitsis, GD	en
dc.contributor.author	Uzunoglu, NK	en
dc.date.accessioned	2014-03-01T01:15:28Z
dc.date.available	2014-03-01T01:15:28Z
dc.date.issued	2000	en
dc.identifier.issn	0018-9480	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13526
dc.subject	biological tissues	en
dc.subject	focusing	en
dc.subject	pulsed signals	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	CAUSALLY DISPERSIVE MEDIUM	en
dc.subject.other	ASYMPTOTIC DESCRIPTION	en
dc.subject.other	HYPERTHERMIA SYSTEMS	en
dc.subject.other	PROPAGATION	en
dc.subject.other	DIELECTRICS	en
dc.title	Analysis of focusing of pulsed baseband signals inside a layered tissue medium	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/22.817469	en
heal.identifier.secondary	http://dx.doi.org/10.1109/22.817469	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	The derivation and application of a method designed to investigate the focusing properties of pulsed baseband signals of short pulsewidth (similar to 1 ns) in biological tissue media are reported. To this end, sources fed from TEM waveguides, concentrically placed at the periphery of a three-layer cylindrical lossy model, are assumed. A Fourier-series-based methodology, appropriate for a useful class of pulse train incident signals, is presented and utilized to study the dynamics of pulse propagation inside the tissue medium. The propagation of each spectral component of the incident field within the tissue medium is analyzed by applying an integral-equation technique and a Fourier-series representation is used in order to obtain the time dependence of the electromagnetic fields produced at any point within tissue due to the pulsed excitation of the array elements. Numerical results are computed and presented at several points in a three-layer geometry, 20 cm in diameter, irradiated by an eight-element waveguide array, Focusing at a specific point of interest within tissue is achieved by properly adjusting the time delay of the signals injected to the individual applicators of the array.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES	en
dc.identifier.doi	10.1109/22.817469	en
dc.identifier.isi	ISI:000084865300005	en
dc.identifier.volume	48	en
dc.identifier.issue	1	en
dc.identifier.spage	30	en
dc.identifier.epage	39	en