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      • 검진센터를 방문한 성인에서 64-MDCT를 이용한 뇌동맥 관상동맥 질환의 발견율에 대한 고찰

        범희남(Hui Nam Beom),최연상(Yeon Sang Choi),선종백(Jong Baek Seon),최성관(Seong Gwan Choi),이규수(Kyu Soo Lee) 대한CT영상기술학회 2008 대한CT영상기술학회지 Vol.10 No.1

        Purpose To evaluate the detection rate of cerebrovascular and coronary artery disease (CAD), which were major cause of sudden death, on the population visiting health screening center using 64-channel multi-detector computed tomography (MDCT) and evaluate the usefulness of MDCT on health screening. Materials and methods 730 patients (M:F=531:199) were included in this study. Simultaneously, they underwent cerebral and coronary MDCT for health screening, MDCT was performed with 64-channel MDCT (Light Speed VCT, GE Health Care, USA) using 0.625mm of slice thickness and 0.35~0.5sec of tube rotation time. Data analysis was based on reading paper. We evaluated the detection rate of cerebrovascular disease including intracerebral aneurysm, steno-occlusive disease, brain tumor and coronary artery disease including presence of calcific plaque and stenotic luminal narrowing of coronary artery. Results The evaluated detection rate of cerebrovascular disease on health screening MDCT was 5.6% (41/730) including 34 patients (82.9%) with intracerebral aneurysm Among these, posterior communicating artery (P-com) aneurym was most commonly detected 18 patient (43.9%). In terms of corona1y artery disease, 217 paitents (29.7%) had calcific plaque and 47 patients (6.4%) had stenotic intravascular luminal narrowing of coronary artery. 14 of 217 patients (6.5%) had calcific plaque was classified into high(>400 calcium score) risk group of CAD. 19 of 47 patients (40.4%) had significant intravascular luminal narrowing was recommended coronary angiography for interventional treatment. Conclusion Cerebrovascular and coronary MDCT is expected to useful diagnostic tool for health screening because that can be used to classify the high risk group of cerebrovascular and coronary artery disease with sudden death potential.

      • 급성 뇌경색 환자의 관류 CT 검사 시 심방세동이 영상에 미치는 영향

        홍설화(Seol Hwa Hong),문일봉(Il Bong Moon),이현성(Hyun Seong Lee),범희남(Hui Nam Beom),전주섭(Ju Seob Jeon) 대한CT영상기술학회 2012 대한CT영상기술학회지 Vol.14 No.2

        I. Purpose Atrial fibrillation(A-fib) is the most common symptom at the arrhythmia. The purpose of this study was to evaluate the possibility that atrial fibrillation(A-fib) could degrade of image of Perfusion CT(PCT) on Acute Cerebral Infarction(ACI) patients. II. Meterial and Methods From January to December 2011, We had evaluated 76patient who were suspected ACI and underwent PCT at C Hospital emergency department. The patient were divided into two groups according to the A-fib(n=36), non A-fib(n=36). Heart rate was classified 2 parts Controlled Ventricular Response(CVR) and Rapid Ventricular Response(RVR) (60<HR<100.HR>100) Then we analyzed that A-fib could effect to PCT image according to heart rate. III. Result CT the 76 patients who had a ACI, 38 patients had been observed A-fib and 38 patients had not been observed. The time density curve(TDC) of A-fib groups and None A-fib groups were evaluated one-way ANOVA. We analyzed that threshold time, peak time, threshold Hounsfield Unit(HU), peak time HU, The results of analysis is that: threshold time(p=0.006), and peak time(p=0.001) were significanted. But threshold HU(p=0.517), peak HU(p=0.927) were not significanted. IV. Conclusions Therefore before PCT scan, CT Radiological technologist should recognize that the patient has A-fib or not, and scan carefully. 목적 관류 CT 영상의 질 저하의 원인 중 하나로, 부정맥에서 가장 흔한 증상인 심방세동일 가능성에 대해 연구하고, 관류 CT 영상에 얼마만큼 영향을 미치는지 알아보고자 하였다. 대상과 방법 2009년 1월부터 2011년 12월까지 C대학교 병원 응급센터에 급성 뇌경색으로 의심되어 뇌 관류 CT를 촬영한 157명의 환자 중 적응증이 된 76명의 환자를 대상으로 하였다. 심방세동 환자군이 뇌 관류 CT 영상에 영향을 주는지 확인하기 위해, 정상군과 심박동수에 따른 Controlled Ventricular Response(CVR), Rapid Ventricular Response(RVR)로 분류하여 분석하였다. 결과 급성 뇌경색 환자에서 심방세동이 관찰된 그룹과, 심방세동이 관찰되지 않은 그룹은 각각 38명이었다. 심방세동이 관찰되지 않은 대조군, CVR, RVR의 TDC에서 threshold time, peak time, threshold Hounsfield Unit(HU), peak time HU를 통계학적으로 비교 분색한 결과, threshold time과 peak time에서 각각 P-value 값이 0.006과 0.001로 유의한 차이를 보였고(P<0.05), threshold HU와 peak time HU는 각각 0.517과 0.927로 통계학적 유의한 차이는 없었다. 결론 뇌 관류 CT 검사 전에 방사선사는 심방세동 유무를 잘 확인하여 영상에 대한 문의 시 적절한 대처를 할 수 있어야 할 것으로 사료된다.

      • 조기 위암진단 있어 수술 전 64volume CT를 이용한 가상위내시경과 수술 후 병리조직결과의 비교

        고창수(Chang Su Ko),방순욱(Sun Uk Bang),정주방(Joo Bang Jeong),범희남(Hui Nam Beom),최성관(Seong Kwan Choi) 대한CT영상기술학회 2007 대한CT영상기술학회지 Vol.9 No.1

        Purpose The arm of this study was prospectively evaluate the accuracy of multi- detector row computed tomography(CT) virtual gastroscopy(VG) and multi-planar reconstruction(MPR) image for detection, precise localization and staging of gastric cancer by comparison with conventional endoscopy and histopathology. Materials and Methods This study shows EGC which is in the Endoscopy from January 2006 to January 2007 and then we analyze who is confirmed 83 patients by histopathology of operative. Prior to evaluated virtual EndC6copy opinion which is 64Volume CT before operative. We gain the images which is used by contrast 140ml and for expansion stomach by air and then injected contrast after 70sec. We obtained images which is workstation by Vutual Gastroscopy and multi-planar reconstruction Results We can’t detected region only 15examples(18%) that EGC 83 examples are standard hsiopathology using a VG and MPR in 64Volume CT. EGC are located where are antrum(38%), Body(30%), Lesser Curvature & Great Curvature(32%), generally region detected antrum, the distinction of sex Man 61patients(73%) and Women 22 patients(32%). Conclusion use of the combination of virtual gastroscopy and dynamic contrast-enhanced MPR images obtained at 64channel volume CT after air and water distention of the stomach can safe methods and useful but which is need endoscopy so compliment with Volume CT.

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