재발성 및 외상성 견관절탈구에 있어서 대조군의 상완골두 및 견갑골와의 비교관찰

최순섭 대한영상의학회 1989 대한영상의학회지 Vol.25 No.1

The causative factors of shoulder dislocation are variable and complex. Among these factors. the author studied retrospectively the significance of G/H ratio in three groups; recurrent dislocation traumatic dislocation and normal contrast group. The results were as follows: 1. The mean value of G/H ratio was 74.1$\pm$4.7% in 59 cases of recurrent dislocation 75.9$\pm$3.2% in 11 cases of traumatic dislocation and 78.2$\pm$4.6% in 148 cases of control group. 2. There was no significant difference in G/H ratio between recurrent dislocation and traumatic dislocation (P>0.05) 3. There was significant difference in G/H ratio between traumatic dislocation and control group. (P<0.01) 4. There was significant difference in G/H ratio between traumatic dislocation and control group.(P<0.05) Therefore small glenoid compared with humeral head (low G/H ratio) was meaningful as one of causative factors in shoulder dislocation.

타자의 영역을 점유한 시선이 형성하는 경계 감각에 관한 연구 ( A Study on the Creation of Sense of the Threshold by the Gazes that Occupy the Realm of The Others )

최순섭,김광현 대한건축학회 2002 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.22 No.2

산소 호흡을 이용한 뇌의 관류 자기공명영상

최순섭 대한자기공명의과학회 2000 Investigative Magnetic Resonance Imaging Vol.4 No.2

목적 : 산소호흡을 이용한 뇌의 관류 자기공명영상의 임상적용 가능성을 알고자 하였다. 대상 및 방법 정상 성인 지원자 2명과 3명의 환자, 각각 모야모야병 환자 1명, 뇌경색환자 1명, 뇌수막종 환자 1명을 대상으로 하였으며, 1.5 Tesla의 자기공명영상 장치를 이용하여 뇌의 자화율 대조 (susceptibility contrast) echo planar image (EPI) 방법으로 뇌영역을 10 slice씩 25회(검사시간은 검사당 1.6초) 영상을 얻었다. 검사자는 안면마스크를 착용한 상태로 스캔 시작 8초 후부터 35초가지 산소 15 liter/min를 실내 공기와 혼합되어 흡입되도록 하였다. 획득된 영상을 Magnetom Vision (Siemens Medical Systems, Erlangen, Germany)의 VB31C 프로그램을 이용하여 산소투여전(3골 번째 검사)과, 산소투여 후의 초기 (12-18 번째 검사)와 후기(19-25 번째 검사) 군으로 나누었다. 초기 및 후기 군과 산소투여전 군의 신호차이는 Z-score 0.7 내지 1.0으로 하여 여러번 영상후 처리를 반복하여 difference map을 얻어서, T1 강조영상에 중첩시켜 관류 영상을 얻었다. 모야모야병 환자는 추가로 Gd-DTPA를 0.1 mmol/kg급속주사 후 동일한 방법으로 관류 영상을 얻어 산소호흡에 의한 관류 영상과 비교하였다. 결과 : 산소 공급 후에 시행한 자화율 대조 EPI 방법으로 2명의 지원자와 각각 1예의 모야모야병, 뇌경색, 뇌수막종 증례에서 혈류 분포를 반영하는 관류 영상을 얻을 수 있었다. 모야모야병 1예의 산소 호흡에 의한 관류 영상은 Gd-DTPA투여후의 관류 영상과 유사한 양상을 보였다. 결론 : 산소호흡을 이용한 자화율 대조 EPI 방법은 향후 뇌의 관류 자기공명영상 방법으로 적용이 가능하리라고 생각된다. Purpose : To know the possibility of clinical application of MRI using oxygen inhalation as a perfusion MRI Materials and methods : Two healthy volunteers and three patients of one moyamoya disease, one acute infarction and one meningioma were studied using a 1.5 Tesla MRI unit. Oxygen (15 liters/min) mixed with room air was given using face mask from 8 second to 35 second during the study. Images were acquired 25 times (scan time per study were 1.6 seconds) using susceptibility contrast EPI (echo planar image) sequence. Difference maps were acquired by early (study 12-18), and late (study 19-25) O2 inhalation image groups minus pre-O2 inhalation image group (study 3-9) with a Z-score of 0.7-1.0 using VB31C program of Magneton Vision. The resulting perfusion images were created by superimposition of difference maps on corresponding T1 weighted anatomic images. On moyamoya patient, similar perfusion images were acquired after Gd-DTPA injection, and compared with O2 inhalation perfusion images. Results ; The author can get the perfusion images of the brain by oxygen inhalation with susceptibility contrast EPI sequence at the volunteers, and the patient of moyomoya disease, acute infarction and meningioma. On moyamoya patient, perfusion images with O2 inhalation are similar with perfusion images by Gd-DTPA injection. Conclusion 1 This study has demonstrated that the susceptibility contrast EPI by oxygen inhalation can be used as the clinically useful perfusion MRI technique

대후두공을 기준으로 한 뇌교와 소뇌편도의 정상위치 : 자기 공명영상을 이용한 계측

최순섭,이영일,정덕환 동아대학교의과대학 1992 동아의대학술지 Vol.4 No.1

부비동의 CT 및 MRI

최순섭 釜算慶南耳鼻咽喉科學會 1993 임상이비인후과 Vol.4 No.2

Does the ADC Map have Additional Clinical Significance Compared to the DWI in the Brain Infarction?

최순섭,하동호,강명진,이진화,윤성국 대한자기공명의과학회 2013 Investigative Magnetic Resonance Imaging Vol.17 No.4

Purpose : To re-evaluate additional clinical significance of the apparent diffusion coefficient (ADC) map in the inference of infarction stage, authors studied the evolution patterns of the DWI and the ADC map of the brain infarction. Materials and Methods: In 127 patients with cerebral infarctions, including follow-up checks, 199 studies were performed. They were classified as hourly (117 studies)-, daily (108 studies)-, weekly (62 studies)-based groups. The signal intensity (SI) was measured at the core of the infarction and contralateral area with ROI of 0.3 cm2 or more on the images of the DWI and the ADC map, and calculated the ratios of SI and ADC value of the infarction area / contralateral normal area, and compared the patterns of the change according to the evolution. Results: Infarction was detected as early as 1 hour after the attack, and the ratio of SI in the DWI became over than 2after 12 hours, which showed a plateau until the 6th day. Thereafter, it decreased slowly to 1 on the 30th day, and changed to lower SI than the surrounding brain. The ratio in the ADC map became 0.46 in 24 hours after the attack, and increased slowly to 1 in the 15th day. Thereafter, it became a higher value than the surrounding brain. Overall, the ratio in the ADC map changed earlier than in the DWI, and the ratio curves showed inverse pattern each other according to the evolution of the infarction. Conclusion: The evolution patterns of infarction on the ADC map showed an inverse curve of DWI curve, which means that the ADC value is accurately predictable from DWI, and the ADC map joined with the DWI seems helpful in the determination of subacute infarction between 15 to 30 days.

현대건축의 타자적 경계공간에 관한 연구

최순섭,김형준,전영훈,김광현 대한건축학회 2006 대한건축학회논문집 Vol.22 No.4

This study is to clarify the 'otherness', which is one of the important issues in the contemporary architecture theory, can be found in the space of threshold. The 'otherness' can be found in the works which deviate from the existing social, cultural and architectural norms. In particular, the conventional asymmetric relation between the interior and the exterior can be changed through the space of threshold revealing the both. Therefore the contemporary architects induce the new cognition of the interior and the exterior through the space of threshold, which 1)depends on the cognition of observers, is 2)vague and 3)infinite-changing. According to these characteristics, the conventional relation between the interior and the exterior can be overthrewand destroyed .Especially these can be grasped through the strategies of the architects used for the cognitive threshold. The elements and effects of such strategies can be understood by analyzing the four gazings. And through various elements like material, media and skin, these strategies including text, image and symbol affect the relation between the interior and the exterior, forming the threshold of the 'otherness'. Hence unlike the fragmented phenomenology analysis of these architectures, this study elucidates these architectural strategies are connected to the property and the change of the relation between the interior and the exterior.

중요 혈액 구성성분이 혈액 CT 번호에 미치는 영향 : 실험적 연구

최순섭 대한영상의학회 1992 대한영상의학회지 Vol.28 No.4

The study was undertaken to evaluate the effect of major blood components on the CT number. The CT numbers according to the various levels of hematocrit, total protein and cholesterol were checked and analyzed by the dilution of pack cell, plasma and 184 complete blood cell count samples under same scanning conditions. In case of normal protein and cholesterol level (33 samples), the CT number was increased about 5.5 hounsfield unit according to 10% increase of hematocrit level: and In case of normal hematocrit and cholesterol level(39 samples), the CT number was increased about 3.5 hounsfield unit according to 1gm% increase of protein level. CT number changes were not predictable according to the changes of cholesterol level(34 samples). From these results, we concluded that major blood component should be considered in the CT number analysis of tissue.

이차원 위상 대조 자기공명영상과 도플러 초음파를 이용한 총뇌혈류량의 정략적 측정

최순섭,이영일,Choe, Sun-Seop,Lee, Yeong-Il 대한영상의학회 2001 대한영상의학회지 Vol.45 No.6

목적 : 이차원 위상 대조 자기공명영상(2-dimensional phase-contrast MRI)과 도플러 초음파를 이용하여 총뇌혈류량(total cerebral blood flow)을 정량적으로 측정하여 비교 관찰하고자 하였다. 대상과 방법 : 뇌신경계의 특별한 이상 병력이 없는 남자 지원자 16명을 대상으로 하였다. 지원자의 연령은 23-31세(평균:26세)였으며, 몸무게는 58-75 kg(평균:66 kg)이었다. 자기공명영상은 제 2-3 경추 추간판 부위에서 이차원 위상 대조 자기공명영상을 시행하여 양쪽 내경동맥과 추골동맥의 혈류량을 측정하였다. 도플러 초음파 혈류검사는 총경동맥 분지 상방 약 2cm 부위에서 내경동맥 혈류량을 측정하였고, 갑상선 상부 부위에서 추골동맥 혈류량을 측정하였으며, 세 번의 반복 검사의 평균값을 측정값으로 하였다. 네 혈관 각각의 이차원 위상대조 자기공명영상 및 도플러 초음파의 측정값은 Wilcoxon and Median score 방법으로 상관관계를 분석하였다. 각 검사법에서의 네 혈관의 측정값을 합한 총뇌혈류량을 구하여 16명 지원자의 평균값을 구하였다. 결과 : 지원자 16명의 이차원 위상대조 자기공명영상 및 도플러 초음파의 측정값은 우측 내경동맥은 각각 233 ml/min와 239 ml/min,좌측 내경동맥은 각각 250 ml/min와 248 ml/min 였고, 우측 추골동맥은 각각 62 ml/min와 56 ml/min,좌측 추골동맥은 각각 83 ml/min와 68ml/min 였다. 이차원 위상대조 자기공명영상 및 도플러 초음파의 측정값의 상관관계 계수는 우측 및 좌측 내경동맥과 우측 및 좌측 추골동맥이 각각 0.48, 0.54, 0.49, 0.62였으며, 두 검사의 총뇌혈류량의 평균은 각각 628 $\pm$68 ml/min(517-779 ml/min), 612 $\pm$79 ml/min(482-804ml/min)였다. 결론 : 정상 지원자에서 위상 대조 자기공명영상과 도플러 초음파를 이용하여 총뇌혈류을 정량적으로 측정할 수 있었으며, 두 검사 모두 비침습적인 방법으로서 쉽게 임상적용이 가능하다고 생각된다. Purpose: To compare of quantitative measurement of the total cerebral blood flow using two-dimensional phase-contrast MR imaging and Doppler ultrasound. Materials and Methods: In 16 volunteers (mean age, 26 years; mean body weight, 66 kg) without abnormal medical histories, two-dimensional phase-contrast MR imaging was performed at the level of the C2-3 intervertebral disc for flow measurement of the internal carotid arteries and the vertebral arteries. Volume flow measurements using Doppler ultrasound were also performed at the internal carotid arteries 2 cm above the carotid bifurcation, and at the vertebral arteries at the level of the upper pole of the thyroid gland. Flows in the four vessels measured by the two methods were compared using Wilcoxon's correlation analysis and the median score. Total cerebral blood flows were calculated by summing these four vessel flows, and mean values for the 16 volunteers were calculated. Results: Cerebral blood flows measured by 2-D phase-contrast MR imaging and Doppler ultrasounds were 233 and 239 ml/min in the right internal carotid artery, 250 and 248 ml/min in the left internal carotid artery, 62 and 56 ml/min in the right vertebral artery, and 83 and 68 ml/min in the left vertebral artery. Correlation coefficients of the blood flows determined by the two methods were 0.48, 0.54, 0.49, and 0.62 in each vessel, while total cerebral blood flows were 628$\pm$68 (range, 517 to 779) ml/min and 612$\pm$79 (range, 482 to 804) ml/min, respectively. Conclusion: Total cerebral blood flow was easily measured using 2-D phase-contrast MR imaging and Doppler ultrasound, and the two noninvasive methods can therefore be used clinically for the measurement of total cerebral blood flow.

갑상선결절의 고해상능 초음파검사 소견

최순섭 대한영상의학회 1985 대한영상의학회지 Vol.21 No.4

Ultrasonography, it's excellent ability of differentiating cystic from solid lesion and depicting detailed architecture, proved itself useful in the diagnosis of thyroid pathologies. Advanced high resolution equipments made hdden small lesion detected and finer structure clearly seen. They seemed to throw light on the histological diagriosis of thyroid diseases, especially differentiation of benignancy and malignancy. Author reviewed pictures of high-resolution ultrasonography of thyroid disease (24 cases) and correlated them with proven pathological findings. The results were as follows: 1. Multiplicity of lesion favors benignancy (4 cases). 2. Well defined margin favors benignancy (14/17), while ill defined margin favors malignancy (3/4), and lesion of no margin favors thyroiditis (3/3). 3. Surrounding halo favors benignancy (7 cases). 4. Hypoechogenicity were found in most of malignancy and thyroiditis. Cystic components in solid nodule were common findings in benign and ma ignant lesions. Calcification was not found in malignancy.