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국내 유방촬영 방사선량 평가 및 국내·외 진단참고수준 조사 분석
남형우,허재빈,이민영,라현준,김광표 한국방사선산업학회 2021 방사선산업학회지 Vol.15 No.3
Mammography is an important medical tool used to diagnose breast cancer. The usageof mammography is continuously increasing due to the development of the medical industry inKorea. The glandular tissue which is sensitive to radiation is exposed during mammography, so itis necessary to manage the patient dose for mammography. Therefore, the objective of this studyis to evaluate the radiation dose for mammography and to investigate and analyze domestic andforeign diagnostic reference levels. In this study, radiation dose assessment methodology based onMonte-Carlo was established for the evaluation of patient radiation dose by mammography. Thestudies on the diagnostic reference level of countries and associations such as the United States,Australia, Spain, Ireland, Bulgaria, and Slovenia were investigated. In Korea, the studies on themammography diagnostic reference level conducted by the Ministry of Food and Drug Safety(MFDS) and the Korea Centers for Disease Control and Prevention (KCDC) were investigated. As a result of evaluating the mean glandular dose and effective dose by mammography usingthe MCNP program, the mean glandular dose and effective dose for the compression breastthickness range of 4~5 cm which is largest number of patients in Korea were 1.36 mGy, 0.163mSv and 1.34 mGy, 0.161 mSv for CC and MLO. In a study conducted by the KCDC in 2018,the mammography diagnostic reference level for phantom and patient was established. Thediagnostic reference level for phantom was 1.59 mGy, which was 14% and 18% higher thanKorea in 2007 and Australia, and 26%, 45%, 7% lower than US, Bulgaria, and Slovenia. Thediagnostic reference level for patient was 1.97 and 1.98 mGy in the CC and MLO, similar to Spainand higher than other countries and associations. The result of patient radiation dose evaluationfor mammography and domestic and foreign diagnostic reference level analysis conducted in thisstudy can be used as basic data for reducing patient dose by mammography in Korea.
요추관 협착증 환자에서 단순 요추방사선 촬영의 진단적 가치에 관한 통계학적 연구
남형우,이동배 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.1
To evaluate the diagnostic advantages of simple lumbar X-ray and clinical features on the lumbar canal stenosis patients, we conducted the study upon the 40 lumbar canal stenosis patients, who were treated at the department of neurosurgery in a general hospital in Seoul, from January 1980 to October 1984. The results of the study were as follows: 1. Of the total 40 patients, the sex ratio was nealy 1, most patients were over forty, and 62.5% of them have been suffered from illness more than one year. 2. Main symptoms and signs were radiating leg pain, backward bending limitation, intermittent claudication motor weakness, in that order. 3. The frequent narrowing vertebral level was L_4~5, as 85.0%. 4. On simple lumbar X-ray, the anteroposterior of spinal canal was 4mm in diameter shorter in patient group, contrast with normal control group. But that was 3mm shorter in interpedicular distance. The difference of diameter and distance were statistically significant. 5. The main myelographic findings were complete and almost complete block, the levels were the site disc space.