Title :
Microwave hyperthermia using retro-focusing
Author :
Sawyer, M.D. ; Edrich, J.
Author_Institution :
Martin Marietta Astronaut. Group, Denver, CO, USA
Abstract :
An improved method of focusing microwave energy onto tumorous tissue has been developed. The technique uses the incoherent thermal emissions of tumors to derive the necessary phase information for focusing a phased-array applicator onto a tumor. A two-dimensional finite-difference time-domain program for TM polarizations was developed. The resulting contour images show that retrofocusing is achieved with a size and location accuracy of significantly less than one wavelength.<>
Keywords :
antenna phased arrays; biothermics; difference equations; microwave antenna arrays; radiation therapy; self-focusing; time-domain analysis; TM polarizations; cancer treatment; contour images; focusing microwave energy; incoherent thermal emissions; microwave hyperthermia; phase information; phased-array applicator; retrofocusing; tumor treatment; tumorous tissue; two-dimensional finite-difference time-domain program; Applicators; Delay effects; Finite difference methods; Focusing; Hyperthermia; Neoplasms; Phased arrays; Polarization; Signal processing algorithms; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115332
