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RISS 인기검색어
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- 저자 : Injeong Yang (검색결과 1 건)
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이보람,Sunyoung Lee,Injeong Yang,윤명근 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.9
The purpose of this study is to evaluate the dose reduction when using the stepwise collimationmethod for scoliosis patients undergoing full spine radiography. A Monte Carlo simulation wascarried out to acquire dose vs. volume data for organs at risk (OAR) in the human body. While theeffective doses in full spine radiography were reduced by 8, 15, 27 and 44% by using four differentsizes of the collimation, the doses to the skin were reduced by 31, 44, 55 and 66%, indicating thatthe reduction of the dose to the skin is higher than that to organs inside the body. Althoughthe reduction rates were low for the gonad, being 9, 14, 18 and 23%, there was more than a 30%reduction in the dose to the heart, suggesting that the dose reduction depends significantly on thelocation of the OARs in the human body. The reduction rate of the secondary cancer risk based onthe excess absolute risk (EAR) varied from 0.6 to 3.4 per 10,000 persons, depending on the size ofthe collimation. Our results suggest that the stepwise collimation method in full spine radiographycan effectively reduce the patient dose and the radiation-induced secondary cancer risk.
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