The development and characterization of clinical intracavity ultrasonic applicators for hyperthermia

Author

Diederich, C.J. ; Hynynen, K.

Author_Institution

Dept. of Radiat. Oncol., Univ. of Arizona Health Sci. Center, Tucson, AZ, USA

fYear

1988

fDate

2-5 Oct 1988

Firstpage

951

Abstract

Cylindrical transducer elements, with sizes and operating frequencies favorable for applications in hyperthermia, are characterized. The effects of cutting these elements from whole cylinders down to halves and quarters (cuts parallel to axis), as well as the resonant frequency of operation (0.5, 1.0, and 1.6 MHz), were investigated. These results were used to develop clinical applicators consisting of multiple elements, one device for each frequency. These clinical applicators were operated with the controlled cooling of the tissue/applicator interface. The efficacy of these applicators were tested in vivo in the canine prostrate, rectal wall, and vaginal wall. The ability of these clinical applicators to provide controlled heating for different tumor geometries is discussed

Keywords

biomedical equipment; biomedical ultrasonics; biothermics; radiation therapy; ultrasonic applications; 0.5 MHz; 1.0 MHz; 1.6 MHz; biomedical equipment; canine prostrate; clinical intracavity ultrasonic applicators; hyperthermia; patient treatment; rectal wall; transducer elements; vaginal wall; Applicators; Cooling; Heating; Hyperthermia; In vivo; Neoplasms; Resonant frequency; Temperature control; Testing; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1988. Proceedings., IEEE 1988

Conference_Location

Chicago, IL

Type

conf

DOI

10.1109/ULTSYM.1988.49517

Filename

49517