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J Korean Soc Ther Radiol > Volume 9(2); 1991 > Article
Journal of the Korean Society for Therapeutic Radiology 1991;9(2): 171-176.
Thermal Distribution in a Phantom Using 8MHz RF Capacitive Type Hyperthermia
Jong Young Lee, Kyung Ran Park, Kye Jun Kim, Ki Joon Sung
1Department of Radiation Oncology, yonsei University, Wonju College of Medicine, Wonju, Korea.
2Department of Radiology yonsei University, Wonju College of Medicine, Wonju, Korea.
ABSTRACT
To evaluate the temperature distribution according to the size of the electrode and the thickness of the phantom using 8MHz radiofrequency capacitive heating device, various sized electrodes and phantoms were used in combination. The radii of the electrodes are 10, 15, 20, 25, 30 and 35cm. When the thickness of the phantom was 25cm or 30cm, homogenous heating was achieved by using the electrode which diameter was equal to or greater than the thickness of the phantom. When the thickness of the phantom was 20cm or less. Homogenous heating was not achieved by the larger diameter of the electorode. When the sizes of paired electrodes were not equal, the smaller electrode side was preferentially heated.
Key Words: Hyperthermia, radiofreguency, Thermal distribution
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