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흉부(胸部) 고관전압(高管電壓) 촬영(撮影)에 있어 Air Gap Technique를 이용한 산란선(散亂線) 경감(輕減)에 관(關)한 연구(硏究)
허준,김창균,강홍석,윤철호,이상석,임한영,송재관,Huh, Joon,Kim, Chang-Kyun,Kang, Hong-Seok,Youn, Chul-Ho,Lee, Sang-Suk,Lim, Han-Young,Song, Jae-Kwan 대한방사선과학회 1980 방사선기술과학 Vol.3 No.1
X-ray grid is the most important means to reduce the scattered ray from patients, but alternative way is air gap technique that is another name of Groedel technique. This technique is mainly used in chest radiography. Authors performed an experimental study on the air gap technique for chest radiography and obtained the results as follows; 1. In using the high voltage air technique, scattered ray could be reduced effectively, while the percentage of scattered ray was slightly increased than conventional grid technique. 2. In film contrast, 30cm air gap technique was inferior to 12:1 grid technique and contrast improvement was increased when the object was thicker and higher voltage was used. 3. The patient exposure dose was reduced about $25{\sim}45%$ compared with conventional grid technique by air gap technique used.
흉부(胸部) X선촬영(X線撮影)에 있어서 희토류증감지(稀土類增感紙) 사용(使用)에 따른 피폭선량(被曝線量) 경감(輕減)에 관한 검토(檢討)
허준,김창균,강홍석,이선숙,송재관,이상석,Huh, Joon,Kim, Chang-Kyun,Kang, Hong-Seok,Lee, Sun-Sook,Song, Jae-Kwan,Lee, Sang-Suk 대한방사선과학회 1981 방사선기술과학 Vol.4 No.1
In chest x-ray radiography, intensifying screen is used to the exposed dose of patients. Recently, newer materials-rere earth elements-are used in intensifying screen. Authors studied the aspects of chest x-ray radiogram and obtained the results that rare earth element intensifying screen did not harm in detail and could reduce the exposed dose of patient by 1/24 and below.