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중증외상환자의 전산화단층촬영 및 중 재술에 의한방사선 유효선량 및 생애 귀속위험도
이원효 ( Won Hyo Lee ),공태영 ( Tae Young Kong ),김승환 ( Seung Hwan Kim ),유제성 ( Je Sung You ),박유석 ( Yoo Seok Park ),이재길 ( Jae Gil Lee ),정성필 ( Sung Phil Chung ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.3
Purpose: This study was performed to calculate and analyze the effective radiation doses from computed tomography (CT) and radiologic intervention in patients in the emergency department (ED) with trauma critical pathway (CP) activation and further to estimate the lifetime attributable risks (LARs) for the incidence of and mortality from cancers induced by the radiation dose. Methods: Through a retrospective electrical chart review of 104 injured patients who trauma critical pathway were activated from November 2012 to March 2013, we calculated effective radiologic doses by taking the product of the dose-linear product of the scan and the conversion coefficient. After a determination of the image results, we divided the patients into two groups, negative or positive, and calculated the effective dose for each group. With these results, we estimated the LARs for the incidence of and the mortality from cancers by using the table in the Biologic Effects of Ionizing Radiation (BEIR)-VII report. Results: A total of 76 patients were enrolled. The mean age was 49.0±8.5 years. The mean injury severity score (ISS) was 12.7±8.4. The cumulative effective dose (CED) for individual patients varied from 2.8 mSv to 238.8 mSv, and the mean was 47.6±39.9 mSv. The CED in patients with an ISS≥16(63.2±26.6 mSv) was higher than that of patients whose ISS<16(33.5±23.1 mSv) (p<0.001). The CED in patients who were treated with surgery or intervention(69.0±45.2 mSv) was higher than that of patients who were treated conservatively(33.6 ±22.4 mSv) (p<0.001). The LARs for cancer incidence and mortality were 328.5±308.6 and 189.0±159.3 per 100, 000 people, respectively. Conclusion: The CED and the LAR for trauma CP-activated patients in the ED were significant, so efforts should be made to decrease the effective dose received by severely injured patients.
이재봉(Jae-Bong Lee),오성효(Sung-Hyo Oh),송지훈(Ji-Hoon Song) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
Light rail are being constructed in cities have populations of mare than 700 thousand in the country as well as many cities in the world as an environmental and a low caron public transit. This paper reviews the capacity selections of electric power system about Light rail transit according to rail, vehicles, operation conditions
Digital Terrain Model을 이용(利用)한 토공량산정(土工量算定)
이석찬,신봉호,이재효,Lee, Suk Chan,Shin, Bong Hoo,Lee, Jae Hyo 대한토목학회 1985 대한토목학회논문집 Vol.5 No.1
According to development of the areial photogrammetry, it is uneconomical to acquire the terrain information and compute the earthwork volume of each building site by a field surveying which is used recently because it is acquired much money and time. The aim in the this thesis is to acquire the terrain information using the Digital Terrain Model (DTM) to gain in the aerial photograph and compute the rapid and economical earthwork carrying out digital test. Because of being little difference between the digital test and field (site) surveying in the earthwork volume, that result is fitter in preliminary planning than in practical planning to the extent. 항공사진측량(航空寫眞測量)이 발달(發達)함에 따라서 현재(現在) 사용(使用)되고 있는 방법(方法)인 현장측량(現場測量)으로서 각 댁지(宅地)들에 대하여 지형정보(地形情報)를 수집(蒐集)하여 토공량(土工量)을 산출(算出)한다는 것은 비용(費用)이나 시간(時間)이 많이 요구(要求)되기 때문에 비경제적(非經濟的)이다. 따라서 본(本) 연구(硏究)에서는 항공사진(航空寫眞)에서 얻은 수치지형(數値地形)모델(DTM)을 이용(利用)하여 지형정보(地形情報)를 수집(蒐集)하고 이를 수치시험(數値試驗)하므로서 신속(迅速)하고 경제적(經濟的)인 토공량(土工量)을 산정(算定)하는데 그 목적(目的)이 있다. 수치시험(數値試驗)을 해서 토공량(土工量)을 계산(計算)한 결과(結果), 현장(現場) 측량(測量)으로부터 산출(算出)된 토공량(土工量)과 차이(差異)가 미소(微小)하므로 정밀도면(精密度面)으로 보아 계획(計劃) 및 예비설계시(豫備設計時)에 적합(適合)할 것으로 여겨진다.