Title :
Theoretical and experimental analysis of air cooling for intracavitary microwave hyperthermia applicators
Author :
Yeh, M.M. ; Trembly, B. Stuart ; Noopes, P.J. ; Heaney, J.A.
Author_Institution :
Thayer Sch. of Eng., Dartmouth Coll., Hanover, NH, USA
Abstract :
An intracavitary microwave antenna array system has been developed and tested for the hyperthermia treatment of prostate cancer at Thayer School of Engineering and Dartmouth-Witchcock Medical Center. The antenna array consists of a choked dipole antenna inserted into the urethra and a choked dipole antenna eccentrically embedded in a Teflon obturator inserted into the rectum. To prevent unnecessary heating of the healthy tissue that surrounds each applicator, an air cooling system has been incorporated into the rectal applicator. The air cooling system was designed and modeled theoretically using a numerical solution of heat and momentum equations within the applicator, and an analytical solution of the Pennes bioheat equation in tissue surrounding the applicator. The 3D temperature distribution produced by the air-cooled rectal applicator was measured in a perfused canine prostate.
Keywords :
biomedical equipment; biothermics; cooling; radiation therapy; Pennes bioheat equation; Teflon obturator; air cooling; air-cooled rectal applicator; choked dipole antenna; healthy tissue heating prevention; intracavitary microwave hyperthermia applicators; perfused canine prostate; prostate cancer; therapeutic heating; urethra insertion; Applicators; Cooling; Dipole antennas; Electromagnetic heating; Equations; Hyperthermia; Medical tests; Medical treatment; Microwave antenna arrays; System testing; Animals; Computer Simulation; Dogs; Equipment Design; Hyperthermia, Induced; Hypothermia, Induced; Male; Microwaves; Models, Biological; Prostatic Neoplasms; Surface Properties; Temperature;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
