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RISS 인기검색어
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- 저자 : 안미섭(Mi Seop An) (검색결과 2 건)
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Computed Radiography 환경에서의 REPEAT 유형변화에 대한 고찰
안미섭,장광현,문희석,정환,An, Mi-Seop,Jang, Gwang-Hyeon,Mun, Hui-Seok,Jeong, Hwan 대한디지털의료영상학회 1997 대한디지털의료영상학회논문지 Vol.3 No.1
Before entering 21st Century, modern medical science is requiring more precise display which is highly estimated in diagnostic value as radial science technology is achieving sharp development. And it is also trying to contribute to improve national health and to offer better service by reducing radial exposure. General projection and Fluoroscopy which are most difficult to be displayed in digital tend to change their way ; from analog to digital with development of Electronic Engineering and Computer Technology, Introducing to CR system in 1994, SMC have displayed General projection and Fluoroscopy 100% in digital using CR system. This study searched differences between repeat rate, repeat type in the exam using Film/Screen and those in the exam using CR system. According to the analysis of repeat types and repeat rate of Film which was reused by using CR system in general projection room and Fluoroscopy room of SMC, we found that total 192,813 films were used and 2,097 films, 1.09% of total were reused. However, actual repeat covers 0.76% to 1,461 sheets with the exception of 636sheets. As above, display process using CR system is 0.76% much lower than general repeat rate 2$\sim$4% of Film/Screen exam. Besides decreased under/over exposure, it is appeared that position failure rate in repeat rate 0.76% covers relatively high 31%. Noticing that repeat caused unskilled devices handing was found many times, sufficient understanding seems to be required to reduce repeat.
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Chest PA 검사 시 피검자의 Effective Dose(유효선량)에 관한 고찰
박상만(Sang Man Park),이상전(Sang Jeon Lee),안미섭(Mi Seop An),문희석(Hee Seok Moon),조남수(Nam Soo Cho) 대한영상의학기술학회 2009 대한영상의학기술학회 논문지 Vol.2009 No.-
Purpose : When examining chest PA, to know whole body x-ray damage level exactly by measuring patients’ effective dose. Materials and methods : The experiment equipment is REVOLUTION XQI chest private x-ray machine of GE Company, Glass dosimeter (DOSE ACE [Asahi Technograju Company]) is used for measuring expose dose. The experimentway is to expose with the conditions FFD 180cm, 100kVp(HVL 4.08mmAl), 3.08mAs, Field Size 43cm*43cm, calculating air absorbing dose by inserting Glass dosimeter organ position endowed organ load coefficient named by ICRP inside ART(ANDERSON RADIATION THERAPHY) Phantom To indicate organ absorbing dose by air absorbing dose in each position multiplies organ and air mass suction coefficient, and then to know Effective Dose by multiplying each organ load coefficient. We found 1 expose effective dose by averaging total 10 times expose, and knew errors 5 times with doing the same process. Results : Examining the above, the average ESD was about 0.1116mGy (SD 4.89, CV 0.044), effective dose was about 29.8420Sv. Conclusion : During the chest PA, the effective dose of patients damaged is about 0.0298mSv, 5 times repetition result is SD 1.04, CV 0.03489.
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