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KMID : 1151820140080050265
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Journal of the Korean Society of Radiology
2014 Volume.8 No. 5 p.265 ~ p.269
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The Study of Dosimetry according to the Thickness of Beam Spoiler on Total Body Irradiation
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Kim Young-Jae
Jeon Byeong-Kyou
Lee Jae-Sik
Jung Jae-Eun
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Abstract
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The therapy of total body irradiation on leukemia carries out to kill harmful bacteria or suppression of immune system by external beam therapy, which is a preparatory stage to reconstitute bone marrow before a pre-treatment of bone marrow transplantation to patients with health bone marrow cells. In case of this kind of radiation therapy, the spoiler use to increase surface dose of patient which varies depending on distance and thickness between patient and spoiler. In this study, the change was investigated the surface dose according to thickness of spoiler. The 0.5% increase of surface dose was observed with each 2.0 cm when the spioler in acrylic was prepared from 0.5 cm to 3.0 cm at intervals of 0.5 cm was evaluated. Based on this result, it suggests that this kind of application will be somewhat limited on clinical trials directly but proper surface dose can be useful method when is applied on patients of treatment prognosis who are required each different surface dose.
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KEYWORD
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TBI, Dosimetry, Beam Spoiler
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