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http://dx.doi.org/10.7742/jksr.2018.12.3.351

A Study on the Surface Dose Distribution by Scattered and Leakage Radiation in Radiation Therapy  

Kang, Jongsu (Department of Radiological Science, Daegu Catholic University)
Jung, Dongkyung (Department of Radiologic Technology, Daegu Health College)
Kim, Yongmin (Department of Radiological Science, Daegu Catholic University)
Publication Information
Journal of the Korean Society of Radiology / v.12, no.3, 2018 , pp. 351-357 More about this Journal
Abstract
During radiation therapy, the patient is exposed to secondary radiation by scattered and leakage radiation. For the diagnostic radiation, guidelines for reducing the patient's exposure as the diagnostic reference level are provided. However, in the case of therapeutic radiation, even though the radiation dose by the secondary radiation is considerable, the prescription dose is not limited because of the reason of the therapeutic efficiency. The purpose of this study was to evaluate the secondary radiation that the patient could be received at the peripheral tissue during the radiotherapy using the linear accelerator with the radiophotoluminescent glass dosimeter. In addition, we measured the degree of saturation of the luminescent amount according to the build-up characteristic of the radiophotoluminescent glass dosimeter. As a result of carrying out this study, the exposure dose decreased drastically farther away from the treatment field. When the head was irradiated with 1 Gy, the neck could be exposed to 18.45 mGy. When the same dose was irradiated at the neck, 15.55 mGy of the head and irradiated at the chest, 14.26 mGy of the neck and irradiated at the pelvis, 1.14 mGy of the chest were exposed separately. The degree of saturation of the luminescent intensity could be overestimated by 1.8 ~ 4.8% depending on time interval for 3 days.
Keywords
Radiation therapy; Secondary radiation; Radiophotoluminescent glass dosimeter;
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Times Cited By KSCI : 4  (Citation Analysis)
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