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Evaluation of a two-dimensional electromagnetic model for hyperthermia treatment planning

A series of hyperthermic, static, torso phantom experiments have been performed. The results are presented in comparison to a two-dimensional, theoretical, electromagnetic model. The 2-D model is assessed for potential use in clinical plannings and evaluations. Included in the assay of this model are comparisons of actual clinical patient data. Theoretically calculated electromagnetic fields and temperatures are obtained using a finite element numerical method (FEM) based on weighted residuals. Two experimental methods of extracting energy deposition data are discussed and utilized: (1) by measuring temperature differentials to calculate specific absorption rates (SAR), and (2) by measuring the square of the E-field directly which relates proportionally to the absorbed power. The employed regional heat source is an annular phased array (APA) operating at 70 MHz. The outcome of the assessment suggests that the results can be quantitative for simple heterogeneous phantom problems, but remain qualitative for clinical evaluative purposes.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/276780
Date January 1988
CreatorsRoss, Michael Paul, 1963-
ContributorsPaulsen, Keith D.
PublisherThe University of Arizona.
Source SetsUniversity of Arizona
Languageen_US
Detected LanguageEnglish
Typetext, Thesis-Reproduction (electronic)
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.

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