Title :
Analysis and measurement of a microstrip array applicator for hyperthermia therapy
Author :
Underwood, H.R. ; Peterson, A.F. ; Magin, R.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
Experimentally measured E-field patterns obtained with a miniature dipole probe are compared with the prediction of a simple cavity-model/array theory. Measurements made at 915 MHz in water using a three-element linear array on a high-dielectric-constant (MCT-85) substrate show lower normal to tangential E-field component ratios then predicted. This suggests safe heating potential at fat/muscle tissue layers within the half-power bandwidth. S-parameters indicate the impedance match quality and mutual coupling. Radiated power patterns can be smoothed by a clinical system using dynamic amplitude and phase control to ensure uniform power deposition during hyperthermia treatments
Keywords :
biomedical equipment; biothermics; microstrip antennas; microwave antenna arrays; radiation therapy; radiofrequency heating; 3-element linear array; 915 MHz; E-field patterns; fat/muscle tissue layers; half-power bandwidth; high-dielectric-constant substrate; hyperthermia therapy; hyperthermia treatments; microstrip array applicator; miniature dipole probe; radiated power patterns; safe heating potential; uniform power deposition; Applicators; Bandwidth; Dielectric substrates; Heating; Impedance; Microstrip antenna arrays; Muscles; Mutual coupling; Phase control; Probes;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96129
