Title :
Optimal SAR distribution from waveguide applicators for hyperthermia of deep-seated tumours
Author :
Habash, R.W.Y. ; Kumar, A.
Author_Institution :
Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
A major characteristic in hyperthermia technology is the ability to focus heat energy on a small region around the tumour to be treated. By applying Kirchhoff-Huygens principle and the scalar theory of diffraction, specific absorption rate (SAR) distribution in a homogeneous muscle due to arrays of open-ended rectangular waveguide as direct-contact applicators (ORWDAs) at 915 MHz are calculated. The results are compared with that of a single ORWDA operating at the same frequency. The array applicators may offer improvement in field size and penetration depth.<>
Keywords :
antenna radiation patterns; electromagnetic wave absorption; electromagnetic wave diffraction; hyperthermia; linear antenna arrays; muscle; optimisation; planar waveguides; radiofrequency heating; waveguide antenna arrays; 915 MHz; Kirchhoff-Huygens principle; ORWDA; array applicators; deep-seated tumours; direct-contact applicators; field size; heat energy; homogeneous muscle; hyperthermia; open-ended rectangular waveguide; optimal SAR distribution; penetration depth; scalar theory of diffraction; specific absorption rate distribution; waveguide applicators; Apertures; Applicators; Electromagnetic heating; Frequency; Hyperthermia; Microwave antenna arrays; Muscles; Physical theory of diffraction; Specific absorption rate; Tumors;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1994. AP-S. Digest
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-2009-3
DOI :
10.1109/APS.1994.407985
