Chest 검사시 산란선에 의한 Gonad 차폐 전후 선량비교 연구

신명호(Myeong ho Shin),강헌효(Heon hyo Kang),김민재(Min jae Kim),이상헌(Sang heon Lee),이예나(Ye na Lee),강동원(Dong won Kang) 대한CT영상기술학회 2013 대한CT영상기술학회지 Vol.15 No.1

목적 Chest CT 검사시 발생하는 산란선에 의해 감수성 높은 장기인 Gonad 부위의 차폐 전후의 평균선량에 대해 비교 연구하였다. 대상 및 방법 Somaton Definition Flash 장비를 사용하여 본원에서 사용하고 Chest Protocol을 이용하여 Rando phantom을 스캔하였다. 먼저 Chest 검사시 정중앙에 RadEye G-10 장비를 위치하여 검사부위의 누적선량을 측정하였다. 그 후, Gonad 부위 차폐 전 전부, 양측부, 후부, Gonad부위의 산란선을 측정하고 Xenolite nolead Apron(0.35 mm PB), Xenolite nolead Apron(front 0.35 mm PB Mix back 0.25 mm PB, Skirt overlap), Half Apron(0.5 mm PB)으로 차폐 후 각각의 누적선량을 측정하였다. 결과 Chest CT 검사시 검사부위의 누적선량은 272μ㏜가 측정되었고, Apron으로 차폐하지 않았을 시에 평균 전부 43μ㏜, 좌측부 81μ㏜, 우측부 82μ㏜, 후부 38.8μ㏜, Gonad부위 16μ㏜로 측정되었다. Xenolite nolead Apron으로 위쪽부분만 차폐하고 측정했을 전부 11.2μ㏜, 좌측부 43.1μ㏜, 우측부 45.3μ㏜, 후부 12μ㏜, Gonad부위 5.2μ㏜로 측정되었다. Xenolite nolead Apron(Skirt overlap)으로 Pelvis 부위를 360° 감싼 후 선량을 측정하였을 때 전부 5.6μ㏜, 좌측부 22.4μ㏜, 우측부 15.7μ㏜, 후부 6μ㏜, Gonad부위 3.2μ㏜로 측정되었다. Half Apron으로 위쪽만 차폐하고 측정했을 때에는 전부 10.7μ㏜, 좌측부 42.6μ㏜, 우측부 40.6μ㏜, 후부 11.3μ㏜, Gonad부위 4.7μ㏜로 측정되었다. 결론 골반부위를 360° 차폐하는 방법이 80% 이상 선량감소를 보였고, 전부 차폐시 70% 이상의 선량감소효과를 보였다. CT를 이용한 모든 검사에 있어 피폭선량 경감을 위한 연구와 차폐가능한 장비를 활용하는 다양한 기법에 관한 지속적인 연구가 필요하리라 사료된다. Ⅰ. Purpose On chest study, it is to reduce exposed dose to minimum in man’s Gonad which is not in the examination area. Ⅱ. Meterial and Methods Rando phantom was scaned in somatom definition flash with chest protocol. First of all, redeye G-10 equipment was placed in the middle of chest and then accumulated dose of examination area was measured. Secondly scatter ray were measured at the front back left and right of Gonad region before shielding and then each dose was measured after shielding with Xenolite nolead apron (0.35 mm PB), Xenolite nolead apron (front 0.35 mm PB Mix back 0.25 mm PB, skirt overlap), Half apron (0.5 mm PB). Ⅲ. Result Accumulated dose of examination region was measured at 272μ㏜ in the chest examination. It was mean front 43μ㏜, left 81μ㏜, right 82μ㏜, back 38.8μ㏜, and Gonad 16μ㏜ without any shielding around Gonad. The accumulated dose had front 11.2μ㏜, left 43.1μ㏜, right 45.3μ㏜ back 12 μ㏜ and Gonad 5.2μ㏜ with the xenolite nolead apron shielding which covers front of pelvis. The dose was front 5.6μ㏜, left 22.4μ㏜, right 15.7μ㏜, back 6μ㏜ and Gonad 3.2μ㏜ after 360° shielding on pelvis with xenolite nolead apron (skirt overlap). It was front 10.7μ㏜, left 42.6μ㏜, right 40.6μ㏜, back 11.3μ㏜ and Gonad 4.7 μ㏜ of front left right and Gonad respectively after only front shielding with half apron. Ⅳ. Conclusions 360° shielding method around pelvis shows dose reduction of over 80%. In addition, only front side shielding shows dose reduction of over 70%. It is necessary to reduce radiation dose to the patient by shielding the region besides the examination area.

순조대 壯勇營 革罷와 東闕 宿衛體制

申明鎬(Shin, Myeong-ho) 국방부 군사편찬연구소 2006 군사 Vol.- No.60

藏書閣 소장 자료와 宗廟의 역사

신명호(Shin Myeong-ho) 한국학중앙연구원 2000 장서각 Vol.- No.4

The Study On The History Of Chong-Myo(宗廟) Through The Chang So-Gak Materials In korean history, The ceremony on the Chong-Myo(宗廟) implies the most important facts which symbolize the national status. in choson period, the standards on Chong-Myo(宗廟) was those for the king under the emperor. but in the empire of the tae-han(大韓帝國) period, the standards for the emperor was made. and in the japanese colonial period, the standards was again changed, for the emperor was demoted the wang (王) under the japanese emperoe(日本天皇). The ChangSo-Gak was royal library during the choson period. So The ChangSo-Gak in the academy of korean studies at the moment has the most important materials on Chong-Myo(宗廟). The ChangSo-Gak has 272 kinds-456 books-materials on Chong-Myo (宗廟) in all. there are 148 kinds-247 books of the choson, 38 kinds-76 books of the empire of the tae-han(大韓帝國) period, and 86 kinds-133 books of the japanese colonial period. In choson period, the royal ceremony was at the same time the national ceremony. the standards on Chong-Myo(宗廟) was most im?portant among the royal ceremony. the standards on Chong-Myo(宗廟) can be classified as below. First, the standards on the construction and the repair of Chong-Myo(宗廟). second, the standards on sacrifice. third, the standards on en-shrining tablet. and forth, the standards on exshrining tablet. The ChangSo-Gak has 10 kinds-13 books for the standards on the construction and the repair of Chong-Myo(宗廟), 45 kinds-126 books for the standards on sacrifice, 61 kinds-63 books for the standards on enshrining tablet, and 19 kinds-20 books for the standards on exshrining tablet. In a word, The ChangSo-Gak materials on Chong-Myo(宗廟) are necessary for the study of choson.

간척지 인근 농경지에서의 비산 및 부유먼지 확산 모니터링(II): 김제 모니터링

황현섭,이인복,신명호,홍세운,서일환,유재인,권경석,김용희,Hwang, Hyun-Seob,Lee, In-Bok,Shin, Myeong-Ho,Hong, Se-Woon,Seo, Il-Hwan,Yoo, Jae-In,Bitog, Jessie.P.,Kwon, Kyeong-Seok,Kim, Yong-Hee 한국농공학회 2009 한국농공학회논문집 Vol.51 No.2

A study on fugitive dusts was conducted at Saemangeum reclaimed land located in Gim-je area. The monitoring result on the fugitive and suspended dust was significantly affected by the farming activities (harvesting and land cultivation) and vehicles passing nearby the measuring points. The concentration of the fugitive dust generated from the reclaimed land was reduced remarkably by the effect of halophyte present on the ground and the tide embankment. Comparing the data collected in 2006 and 2007, the concentrations of TSP and PM10 decreased by 47.4% and 29.5%, respectively. After harvesting operations at paddy field, TSP increased by 22% while PM10 increased by 54%. The concentration of a Cl- which is a representative ion of sea-salt decreased to about 35% in 2007 compared with 2006. This represents that the inside area change and plant covering rate affected on the decrease of fugitive dust. The correlation analysis for the compounds of topsoil at each measuring point shows that near the coastline is more comparable. The canopy of halophyte in the source area also increased which reduced the fugitive dust remarkably. The dust distribution measured by dust spectrometer at the same point shows that most particles are $0.5{\mu}m$ to 2um size but not greater than $5{\mu}m$.

주민생활사를 통해 본 무허가 정착지(판자촌)의 역할과 기능

박신영 ( Park Sin-yeong ),신명호 ( Shin Myeong-ho ),정상협 ( Chung Sang-hyeop ) 한국도시재생학회 2016 도시재생 Vol.2 No.1

The objective of this study is to re-construct the lives of residents of squatters demolished by urban redevelopment and to illustrate the functions and roles of these illegal settlements. We interviewed thirty-one former residents who had lived in six illegal settlements(Hyeonjeo-dong, Don’amdong, Geumho-dong, Haengdang-dong, Nan’gok-dong, Sanggye-dong) between the 1960s and the 1990s and asked them questions about lifestyles, economic activities(employment, consumption, saving), family life, education, and human networks with relatives and neighbors [in and out of the community], and daily struggles. As a result, the study finds that illegal settlements provided cheap housing needed for residents’ survival, relayed job information, and served as the social safety net. In other words, the life in an illegal settlement was impoverished and uncomfortable, but mutually beneficial human relations that residents formed with each other helped them persevere through these hardships. Reminiscing the past, former residents of demolished illegal settlements now feel solitude and isolation from neighbors.

온실가스 지중저장 적지를 위한 데이터 구축

이사로(Saro Lee),이창현(Changhyun Lee),신제현(Jehyun Shin),고보균(Bokyun Ko),이창욱(Chang-Wook Lee),신영식(Yeong Shik Shin),신명호(Myeong Ho Shin),국중현(Junghyun Kook),박창현(Changheon Park) 대한지질학회 2022 대한지질학회 학술대회 Vol.2022 No.10

진안지역 통합 관광 시스템 구축을 위한 지질자원의 중요 역할

이승환(Seung Hwan Lee),김원정(Won Jeong Kim),문다혜(Da Hye Mun),신명호(Myeong Ho Shin),이정훈(Jeong Hun Lee),장지은(Ji Eun Jang) 대한지질학회 2017 대한지질학회 학술대회 Vol.2017 No.10

Lower extremity CTA의 80kvp scan에 관한 protocol 연구

김민재(Min Jae Kim),강헌효(Hyeon Hyo Gang),신명호(Myeong Ho Shin),김도훈(Do Hoon Kim),이상헌(Sang Heon Lee),강동원(Dong Won Gang) 대한CT영상기술학회 2013 대한CT영상기술학회지 Vol.15 No.1

목적 : Lower extremity CTA(Computed Tomography Angiography : 이하 CTA)는 우수한 하지 혈관계 묘사로 진단적 가치가 높지만 인체의 거의 전체 면적을 포함해야 하는 long scan range에 대한 높은 선량을 적절한 조건의 제한을 통하여 감소시키고 이를 판독함에 있어 진단적 가치에는 이상은 없는 지를 확인하고 이를 보편적인 검사방법으로 제시하고자 한다. 대상 및 방법 : CT 장비는 MDCT dual source ; Somatom Definition Flash (Siemens medical system: Germany)를 사용하였다. 본원에서는 2012년 11월 30일부터 Lower extremity CTA 검사를 기존 100kVp 조건에서 80kVp로 낮추어 검사를 진행하고 있으며 이 기점에서 전후(2012년 5월 1일~2013년 2월 3일)로 30건씩 총 60건의 표본을 얻어 Noise 값의 지표인 SD(Standard Deviation)값을 측정하고 평균값을 구하여 비교 평가하였다. 그리고 80kvp로 검사한 30건에 관하여 각 영상에 4단계 점수를 부여하여 정성적 평가를 시행하였다. 결과 : 60건의 검사에서 측정된 SD(Standard Deviation)의 평균값으로 복부대동맥은 100kVp에서 27.48, 80kVp에서 35.84, 서해부 부근은 100kVp에서 27.27, 80kVp에서 38.12, 무릎관절 부근은 100kVp에서 26.93, 80kVp에서 37.50으로 각각 측정되었다. 3명의 평가자가 80kVp로 검사한 30건의 영상에 부여한 정성적 평가의 평균점수는 3.22이었으며 각 영상의 평가점수별 백분율은 1점이 0.43%, 2점이 10.07%, 3점이 62.44%, 4점이 27.06%를 차지하였다. 2점 이상이면 진단적 가치가 있다고 평가하였기에 진단적 가치에 있어서 문제가 없음을 확인하였다. 또한 54.5% 선량감소 효과가 나타났다. 결론 : 80kVp를 적용한 Lower extremity CTA검사는 말초동맥질환의 진단 및 평가에 도움이 될 것으로 생각되며 long scan range에 대한 높은 선량의 위험부담을 줄일 수 있을 것으로 사료된다. 또한 본 연구에서 제시한 80kVp의 적용 방법은 long scan range를 요하는 검사에 응용하거나 적용이 가능할 것으로 사료된다. Purpose : Lower extremity CTA(Computed Tomography Angiography :CTA) is an excellent portrayal for pelvic limb blood vessel and thus, holds high diagnostic value. However, we tried to confirm if there is no problem in diagnostic value, when reading and reducing the high dose of the long scan range, which includes almost the whole area of human body, through restriction of proper conditions and suggest this as a universal testing method. Materials and methods : Multi-detector row CT ; Somatom Definition Flash (Siemens medical system: Germany) was used as CT equipment. Our hospital has been preceding Lower extremity CTA test, lowering to 80kVp from original 100kVp condition since 2012 Nov. 30. From that on(2012.05.01~2013.02.03), by getting total 60 samples for 30cases each the SD(Standard Deviation), indicator of Noise value, were measured and measured this against that after getting the average. After we assigned 4 level of grades to the tested 30 cases in 80kvd and preceded qualitative evaluation. Results : The average of SD(Standard Deviation) measured throughout 60 tests were, as for abdominal aorta 27.48 in 100kVp a, 35.84 in 80kVp, for inguinal region 27.27 in 100kVp, 38.12 in 80kVp and for the knee joint part 26.93 in 100kVp, 37.50 in 80kVp. 30 images that were tested with 3 evaluators in 80kVp, resulted of having average of 3.22 for the qualitative evaluation given to the image. The percentage of evaluated score of each image were 0.43% for point 1, 10.07% for point 2, 62.44 for point 3, 27.06% for point 4. It was evaluated as having diagnostic worthy when the score is above 2 and thus, we confirmed that it has no problem in diagnostic matters. Also, it showed 54.5% of dose decrease effect. Conclusion : This Lower extremity CTA test which applied 80kVp, is believed to be a help in diagnosing and evaluating peripheral arterial disease, though abiding by many limited factors. Also, it is considered as to decrease the hazard in high dose of scan range. In addition, in this study, it is considered that applying the 80kVp applied method is possible as an universal method in tests that are in need of long scan range.

고군산군도지역의 신원생대 방축도층과 이를 관입한 화성암의 형성시기 및 지구조환경

김원정(Won Jeong Kim),오창환(Chang Whan Oh),이승환(Seung Hwan Lee),김진석(Jin Seok Kim),신명호(Myeong Ho Shin),정지완(Ji Wan Jeong) 한국암석학회 2019 한국암석학회 학술발표회 논문집 Vol.2019 No.5

Dual-Source CT에서 Coronary Angiography 검사와 병행한 Cardiac Stress Perfusion검사의 유용성과 선량에 대한 고찰

손성실(Seong Sil Son),박찬혁(Chan Hyeok Park),현진경(Jin Kyeong Hyeon),이예나(Ye Na Lee),신명호(Myeong Ho Shin),강동원(Dong Won Kang) 대한전산화단층기술학회 2011 대한CT영상기술학회지 Vol.13 No.2

목적 128 dual-source CT에서 adenosine 약물을 이용하여 심장에 부하를 준 후 단 한번의 CT Angiography를 시행함으로써 관상동맥질환의 감별과 동시에 심근관류의 평가가 가능한지에 대하여 알아보고 이 때의 환자피폭선량을 비교하고 평가하여 이 검사 방법의 유용성에 대하여 알아보고자 하였다. 대상 및 방법 2009년 11월 2부터 2010년 4월 30일까지 본원을 내원하여 CT Stress Perfusion + 3D Heart 검사를 받았던 90명의 환자를 대상으로 하였다. 검사 방법은 환자의 양 주관절에 정맥을 확보한 후 왼쪽 주관절로 adenosine 약물을 0.14mg/kg/min로 주입하여 3분 후 심장이 충분히 부하되었을 때 CT 검사가 시작될 수 있도록 bolus tracking을 2분 35초부터 시작하였다. 후향적 동조화 검사방법으로 300~400msec 구간에만 전선량이 나가게 하는 Mindose를 적용하였고 환자의 체질량지수에 따라 120kV와 100kV로 검사조건을 달리하였다. 영상평가는 Perfusion defect와 관상동맥 질환을 동시에 진단할 수 있는지에 대하여 감별하였고 관상동맥 내경이 50% 이상 협착이 있는 환자 28명은 관상동맥 조영술과 함께 심근분획혈류예비력을 시행하여 진단의 일치성을 확인하였다. 환자선량평가는 검사 후 장비에서 도출되는 선량지표를 통하여 120kV와 100kV일 때로 나누어 비교 평가하였다. 결과 90명의 환자 중 87명의 환자에게서 관상동맥과 Perfusion defect 유무를 감별할 수 있어 96.6% 성공률을 보였으며 관상동맥조영술과 CT Angiography의 결과를 비교한 결과 민감도 93.1%, 특이도 85.2%, 양성예측도 75%, 음성예측도 93.3%였으며 심근분획혈류예비력과 CT Perfusion image를 비교한 결과 민감도 93.1%, 특이도 91.8%, 양성예측도 84.3%, 음성예측도는 96.6%로 분석되었다. 환자유효선량은 100kV일 때 3.89±0.58mSv, 120kV일 때 4.93±1.31mSv로 평가되었다. 결론 DSCT의 발달로 심근관류의 평가와 더불어 추가적인 검사 없이도 관상동맥의 비침습적 영상화가 기능하게 되어 환자들은 적은 피폭선량과 한 번의 조영제 주입으로 허혈성심질환과 관상동맥질환 여부를 진단받을 수 있게 되었으며 심장기능 평가가 필요없는 환자라면 전향적 동조화 검사방법 검사가 가능하며 이 경우 환자선량을 크게 절감시킬 수 있을 것으로 사료된다. I. Purpose To investigate the feasibility of single scan adenosine-induced stress low dose CT coronary angiography and myocardial perfusion imaging for diagnosis of ischemic heart diseaseusing 128 slice dual source CT(DSCT). II. Meterial and Methods Ninety patients with chest pain and low to intermediate pretest probability were prospectively enrolled. Adenosine-induced stress coronary CT angiography using retrospective ECG gating with 128 slice dual-source CT(SOMATOM Definition Flash, Siemens Medical System, Germany). 28 patients with Significant stenosis(lumen diameter reduction > 50% detected on CT angiography were performed coronary angiography(CA) with fractional flow reserve(FFR) as a standard reference for evaluation of status on myocardial perfusion. Theneffective dose was estimated according to dose. III. Result Of the patients, there were forty two patients with coronary artery disease only, twenty eight patients with coronary artery disease and perfusion defects at the same time. Seventy patients were normal on CT angiography. Three patients can’ t be diagnosed due to aggressive chest pain induced adenosine and data loss caused low heart rate. Comparative diagnostic accuracy was observed in CT coronary angiography and stress perfusion. CT coronary angiography sensitivity, specificity, positive predictive value and negative predictive value were 93.1%, 85.2%, 75%, 93.3% respectively. In addition stress perfusion image sensitivity, specificity, positive predictive value and negative predictive value were 93.1%, 91.8%, 84.3%, 96.6% respectively. The effective radiation dose were 3.83mSv±0.58mSv in 100kV, 4.93mSv±1.31mSv in 120kV. IV. Conclusions Single scan CT coronary angiography and adenosine-induced stress perfusion using 128 slice dual-source CT could give information about both coronary artery disease and ischemic heart disease by lower radiation dose.