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Evaluation and optimization of the electromagnetic performance of interstitial antennas for hyperthermia. 1990

M F Iskander, and A M Tumeh, and C M Furse
Electrical Engineering Department, University of Utah, Salt Lake City 84112.

Effective and realistic evaluation of the performance of interstitial antennas for microwave hyperthermia involves: (a) calculations of the radiation characteristics of these antennas, including those of multi-section designs, and (b) the development of 3-dimensional models of tumors and the computation of the power deposition patterns in these tumors due to their irradiation by an array of interstitial antennas. In this paper, we address both of these issues. Specifically, we developed numerical models for calculating the radiation characteristics of multi-section insulated antennas, and we utilized a 3-dimensional model based on a volume integral equation formulation for calculating the power deposition pattern in tumors. Numerical results were verified by comparing them with experimental data available in the literature. New numerical data are presented to illustrate the advantages of multi-section designs over uniformly-insulated interstitial antennas and to show the feasibility of using amplitude and phase steering capabilities to control the power deposition patterns of an interstitial antenna array. The role of each section in a multi-section antenna design in guiding versus radiating the electromagnetic energy and hence in controlling the power deposition pattern of multi-section antennas is also described.

UI MeSH Term Description Entries
D006979 Hyperthermia, Induced Abnormally high temperature intentionally induced in living things regionally or whole body. It is most often induced by radiation (heat waves, infra-red), ultrasound, or drugs. Fever Therapy,Hyperthermia, Local,Hyperthermia, Therapeutic,Thermotherapy,Induced Hyperthermia,Therapeutic Hyperthermia,Therapy, Fever,Local Hyperthermia
D009369 Neoplasms New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms. Benign Neoplasm,Cancer,Malignant Neoplasm,Tumor,Tumors,Benign Neoplasms,Malignancy,Malignant Neoplasms,Neoplasia,Neoplasm,Neoplasms, Benign,Cancers,Malignancies,Neoplasias,Neoplasm, Benign,Neoplasm, Malignant,Neoplasms, Malignant
D004867 Equipment Design Methods and patterns of fabricating machines and related hardware. Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D005069 Evaluation Studies as Topic Works about studies that determine the effectiveness or value of processes, personnel, and equipment, or the material on conducting such studies. Critique,Evaluation Indexes,Evaluation Methodology,Evaluation Report,Evaluation Research,Methodology, Evaluation,Pre-Post Tests,Qualitative Evaluation,Quantitative Evaluation,Theoretical Effectiveness,Use-Effectiveness,Critiques,Effectiveness, Theoretical,Evaluation Methodologies,Evaluation Reports,Evaluation, Qualitative,Evaluation, Quantitative,Evaluations, Qualitative,Evaluations, Quantitative,Indexes, Evaluation,Methodologies, Evaluation,Pre Post Tests,Pre-Post Test,Qualitative Evaluations,Quantitative Evaluations,Report, Evaluation,Reports, Evaluation,Research, Evaluation,Test, Pre-Post,Tests, Pre-Post,Use Effectiveness
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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