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KMID : 0362919920100010121
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Journal of the Korean Society for Therapeutic Radiology and Oncology
1992 Volume.10 No. 1 p.121 ~ p.123
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Determination of the Phantom Scatter Factor (Sp Factor) using a small Block in the Phantom
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Yi Byong-Yong
Hong Seok-Min
Kim Jae-Sung
Choi Eun-Kyung
Chang Hye-Sook
Lee Myung-Za
Chun Ha-Chung
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Abstract
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New measurement method for Sp factors (Phantom Scatter Factors) is presented. The theoretical development of the approach is disscused showing that Sp factors can be obtained from three measurements of ionnization in a blocked, reference field and open field. This method has been tested using 60Co gamma rays. The results were within 1% deviation between the theory and the experiment for the Sp facter. The new method does not need air measurement, and we could determine the Sp p factors with a small piece of block.
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KEYWORD
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Scatter Factor, Dosimetry
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