432-MHz LOCAL HYPERTHERMIA SYSTEM USING AN INDIRECTLY COOLED, WATER-LOADED WAVEGUIDE APPLICATOR.

Uzunoglu Nikolaos, K; Angelikas Elias, A; Cosmidis, PA

dc.contributor.author	Uzunoglu Nikolaos, K	en
dc.contributor.author	Angelikas Elias, A	en
dc.contributor.author	Cosmidis, PA	en
dc.date.accessioned	2014-03-01T01:06:43Z
dc.date.available	2014-03-01T01:06:43Z
dc.date.issued	1987	en
dc.identifier.issn	0018-9480	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9583
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	BIOMEDICAL ENGINEERING - Hyperthermia Therapy	en
dc.subject.other	WAVEGUIDES - Microwaves	en
dc.subject.other	INDIRECT COOLING	en
dc.subject.other	LOCAL HYPERTHERMIA SYSTEM	en
dc.subject.other	WAVEGUIDE ANTENNA	en
dc.subject.other	ANTENNAS	en
dc.title	432-MHz LOCAL HYPERTHERMIA SYSTEM USING AN INDIRECTLY COOLED, WATER-LOADED WAVEGUIDE APPLICATOR.	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/TMTT.1987.1133611	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TMTT.1987.1133611	en
heal.language	English	en
heal.publicationDate	1987	en
heal.abstract	A water-loaded indirectly cooled waveguide antenna with a small aperture (2 multiplied by 5. 5 cm**2) has been developed for local hyperthermia applications. The operation frequency is 432 MHz. The indirect cooling is achieved by circulating water in an external chamber having common walls with the waveguide, and good thermal and electrical stability is achieved for radiation powers up to 100 W. The water loading provides a good coupling of the radiated power into tissue. The observed variations in standing wave ratios and the concentration of the specific absorption rates (SARs) are found to be satisfactory for localized superficial hyperthermia treatments. The matching of the water-loaded antenna into the power generator requires special attention because of two possible matching conditions corresponding to high- and low-power dissipations inside the antenna cavity. SAR distributions inside tissues have been computed and compared with thermographic measurements performed in phantoms. Preliminary results of trials in Wistar rats transplanted with Walker sarcoma are also reported.	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/TMTT.1987.1133611	en
dc.identifier.isi	ISI:A1987F767000004	en
dc.identifier.volume	MTT-35	en
dc.identifier.issue	2	en
dc.identifier.spage	106	en
dc.identifier.epage	111	en