한국의학물리학회:학술대회논문집 (Proceedings of the Korean Society of Medical Physics Conference)
- 한국의학물리학회 2003년도 제27회 추계학술대회
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- Pages.53-53
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- 2003
Intracavitary Ultrasound Hyperthermia Applicators for Gynecological Cancer
- Lee, Rena J. . (1Radiation Oncology, Ewha Womans University Mokdong Hospital) ;
- Suh, Hyun-Suk (1Radiation Oncology, Ewha Womans University Mokdong Hospital)
- 발행 : 2003.09.01
초록
For evaluating the feasibility of treating recurrent lesions in the vaginal cuff and cervix by hyperthermia, ultrasound applicators were designed, constructed, and characterized. For the treatment A half-cylindrical transducer Cd=1cm, length=lcm) and cylindrical transducer (d=2.5cm, length= 1.5cm) were used to construct ovoid type and cylindrical applicators. For the ovoid type applicator, each element was operated at 1.5MHz and characterized by measuring transducer efficiency and acoustic power distribution. Thermocouple probes were used to measure the temperature rise in phantom. The element sizes used in this study were selected to be comparable for high dose rate brachytherapy colpostat applicator. Each element was powered separately to achieve a desired temperature pattern in a target. The acoustic output power as a function of applied electric power of the element 1 and 2 was linear over this 1 to 40 W range and efficiencies were 32.2