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Electromagnetic phased arrays for regional hyperthermia -- optimal frequency and antenna arrangement

Please always quote using this URN: urn:nbn:de:0297-zib-5961
  • In this paper we investigate the effects of the three-dimensional arrangement of antennas and frequency on temperature distributions that can be achieved in regional hyperthermia using an electromagnetic phased array. We compare the results of power-based and temperature-based optimization. Thus we are able to explain the discrepancies between previous studies favouring more antenna rings on the one hand and more antennas per ring on the other hand. We analyze the sensitivity of the results with respect to changes in amplitudes and phases as well as patient position. This analysis can be used for different purposes. First, it provides additional criteria for selecting the optimal frequency. Second, it can be used for specifying the required phase and amplitude accuracy for a real phased array system. Furthermore, it may serve as a basis for technological developments in order to reduce both types of sensitivities described above.

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Author:Martin Seebass, Rudolf Beck, Johanna Gellermann, Jacek Nadobny, Peter Wust
Document Type:ZIB-Report
Tag:Pelvic heating; phased array optimization
MSC-Classification:65-XX NUMERICAL ANALYSIS / 65Nxx Partial differential equations, boundary value problems / 65N30 Finite elements, Rayleigh-Ritz and Galerkin methods, finite methods
92-XX BIOLOGY AND OTHER NATURAL SCIENCES / 92Cxx Physiological, cellular and medical topics / 92C50 Medical applications (general)
Date of first Publication:2000/08/30
Series (Serial Number):ZIB-Report (00-28)
Published in:Appeared in: International Journal of Hyperthermia 17 (4), 2001, pp. 321-336