관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

결합조직형성 법랑모세포종의 방사선학적 소견 : 증례보고 3례

최다혜,허경회,문제운,이원진,허민석,이삼선,최순철,박관수 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1

Desmoplastic ameloblastoma is a rare histologic variant of ameloblastoma. It shows important differences in anatomic distribution, histologic appearance, and radiographic findings compared with the general type of ameloblastoma. It is histologically characterized by an abundance of densely collagenous stroma and radiographically a mixed radiolucent-radiopaque lesion. We present three cases of desmoplastic ameloblastoma. All the patients complained on buccal swelling with or without pain and the sites of occurrence were the anterior and the premolar region. Plain radiographs showed mixed radiopaque-radiolucent lesion with ill-defined or diffuse sclerotic margin and no external root resorption. Additionally, CT scans revealed buccal expansion and relatively well-defined margin of the lesions. The clinical and radiographic features of the presented cases were compared with those of the desmoplastic ameloblastoma in the previous literatures. (Korean J Oral Maxillofac Radiol 2006; 36 : 63-8)

서울대학교 치과대학 구강악안면방사선학교실

최순철,고재희,박태원,유동수,이삼선 大韓口腔顎顔面 放射線學會 1997 Imaging Science in Dentistry Vol.27 No.1

The aneurysmal bone cyst is a nonmalignant reactive bone lesion. Developing rarely in the craniofacial region, and more commonly affecting the long bones and the spine, the lesion has variable etiopathogenic characteristics. The authors diagnosed a 33-year-old female as aneurysmal bone cyst after undergoing clinical, radiological and histological examinations. The characteristics were as followed: 1. The patient complained of pain and swelling of the right preauricular area. 2. The conventional radiograms showed a relatively well defined radiolucent lesion with partially scalloping margin. The cortical bone of the right condyle was thinned and expanded by the lesion. 3. Bone scintigraphy with ?Tc demonstrated ring-like or doughnut-pattern accumulation of radioactivity. 4. On T1-weighted imaging of MRI, the lesion on the right condyle had middle signal intensity. T2-weighted MRI demonstrated multiple high signal intensities separated by septa which had low signal intensity. Finger in ballon appearance was seen. 5. Histologically, the lesion was composed of large sinusoidal blood spaces lined by fibroblasts and histiocytes. Its fibrous stroma consisted of fibroblstic element, multinucleated giant cells, extravasated erythrocytes and focal hemosiderin pigmentation. New bone formation was also observed around larger sinusoidal spaces.

상악동의 점막비후에 대한 WATERS방사선사진과 파노라마방사선사진 및 전산화단층사진의 진단능 비교

최순철,이삼선,현영민 大韓口腔顎顔面 放射線學會 1998 Imaging Science in Dentistry Vol.28 No.1

With the CT findings as gold standard, the sensitivity, the specificity, and the diagnostic accuracy of Water's radiography and Waters' radiography with panoramic radiography were compared in the diagnoses of antral mucosal thickening of 16 patients. Three oral radiologists and three non-oral radiologists interpreted the Waters' radiographs and after 4 weeks, interpreted the Waters' radiographs and panoramic radiographs simultaneously. The interpretation point was the existence or the non-existence of the mucosal thickening on the medial, the posterolateral, the floor, and the roof of maxillary sinus. The obtained results were as followed: 1. In oral radiologist group, the sensitivity, specificity and diagnostic accuracy of Waters' film were 0.7250, 0.8489 and 0.7578 respectively. 2. The sensitivity and the diagnostic accuracy in oral radiologist group were higher than those of non-oral radiologist group (P<0.05), but there was no significant difference between two groups in the specificity (P>0.05). 3. There was no significant difference of the diagnostic abilities except the specificity in oral radiologist group between Waters' radiography and Waters' radiography with panoramic radiography (P>0.05). 4. The sensitivity and the diagnostic accuracy were the highest in the case of medial wall interpretation, the specificity was the highest in the posterolateral wall. 5. In the posterolateral wall and the floor, the sensitivity and the diagnostic accuracy of oral radiologist group were higher than those of non-oral radiologist group (P<0.05).

임플랜트전산화단층촬영시 CENTRAL PANORAMIC CURVE의 변화가 하악골의 영상 재구성에 미치는 영향

최순철,유동수,이삼선,박래정,박태원 大韓口腔顎顔面 放射線學會 1998 Imaging Science in Dentistry Vol.28 No.1

The purpose of this study was to investigate an influence of the change of central panoramic curves on the image reconstruction in the dental implant CT. The author designed three experimental groups according to the location of central panoramic curve. In group A, central panoramic curve was determined as the couve connecting the center of roots from the first premolar to the first molar. In group B, central panoramic curve was determined as the line connecting the lingual cortical plate at the level of the mesial aspect of the first premolar with the buccal cortical plate at the level of the mesial aspect of the first molar. In Group C, central panoramic curve was determined as the line connecting the buccal cortical plate at the level of the mesial aspect of the first premolar with the lingual cortical plate at the level of the mesial aspect of the first molar. Twenty four reformatted CT images was acquired from four mandibles embedded in the resin block and twenty four contact radiographs of dog specimens were acquired. Each Image was processed under Adobe Photoshop program analysed by MSPA (mandible/maxilla shape pattern analysis) variables such as MXVD, MXHD, UHD, MHD, and LHD. The obtained results were as follows; 1. The mean of MXVD variable was 19.9, 20.2, and 20.0 in group A, B, and C, respectively, which were smaller than actual value 20.5. But, there was no significant difference among 3 groups(P>0.05). 2. The mean of MXHD, UHD, MHD, and LHD variables in group A,B,and C was 11.9, 12.2, and 12.3; 9.3, 9.5, and 9.6; 10.0, 10.3, and 10.3; 9.2, 9.3, and 9.4 respectively which were equal to or greater than the actual value 11.8, 9.3, 10.0, and 9.2, But, there was no significant difference among 3 groups (P>0.05). 3. The number of noneffective observations with difference over or under 1 mm with comparison to the actual value was 24(20%), 58(48.3%), and 52(43.3%), respectively, in group A, B, and C. 4. In group A, the number of observations over 1 mm and under 1mm was 9 and 15, respectively, but in group B and C, the number of observations over 1 mm was more than under 1 mm.

Plasminogen kringle (angiostatin) 분획의 유효부분 분석

최영기,서원덕,이종수,신광순,김철중 충남대학교 수의과대학 동물의과학연구소 1998 動物醫科學硏究誌 Vol.6 No.-

In order to inhibit the growth of the malignant tumor, the development of various drugs against the malignant tumors has been archived. The combination of these drugs made the tumor therapy possible, but in many cases, secondary matastasis of the tumor to the other organs after its removal has been frequently reported. The angiostain, recently purified and cloned, not only promtes the angiogenesis of the tumor itself in the primary tumor but also inhibits the angiogenesis and metastasis of the secondary tumors. In this study, the nucleic acid sequences of the angiostatin was investigated. And the angiostain gene was expressed in a prokayotic expression system(E. coli) and a eukayotic expression system(Pichia pastoris). The angiostain gene was futher subcloned into 6 clones to characterize its biological activity. In the near future the biological activity and the biochemical property of the protein encoded by each clone will be elucidated.

5개 생물학적 특성에 의한 Mycobacteria 제Ⅳ군의 균집합체 분류 및 M. fortuitum-chelonei Complex의 동정

최철순,장종대,양용태 중앙대학교 의과대학 의과학연구소 1985 中央醫大誌 Vol.10 No.3

Mycobacteria GroupⅣ or rapid growers were classified into 12 clusters by the combined use of the five test characters, i.e., pigmentation on Lo¨wenstein-Jensen medium containing soluble extracts (crocin) of Gardenia jasminoides(referred to L-J crocin medium), arylsulfatase, nitrate reductase, iron-uptake and 5% NaCl tolerance, and the differential identification of Mycobacterium fortuitum and M. chelonei by the 5-test characters was evaluated with reference strains and isolates from sputa of patients with pulmonary tuberculosis-like diseases. In addition, the 5-day crocin reaction with different species or clusters of mycobacteria Group Ⅳ on L-J crocin medium assessed. Of 12 strains of M. fortuitum 9 strains() 75.0% belonged to cluster 5a, 2(16.7%) 5b and one(8.3%)7a, respectively, and of two strains of M. chelonei one strain belonged to 8a and the other 8b. The 5-day crocin test also proved to be valuable in the rapid presumptive differentiation of M. fortuitum complex from other rapid growers.

特殊한 測点을 이용한 等高線작성에 있어서 非線形 補間法의 效用法

崔哲淳,崔勝弼 관동대학교 1990 關大論文集 Vol.18 No.1

Points of maximum and minimum elevations together with Points of Curvature inflection are Chosen in the field when execating levelling nets. Since these points are definite and Special in defining the slope of the ground surface, they are used in a Mathematical model for Canfouring. This method proves to more rigorous than the Usual linear interpolation. It also reduces the amount of field work required, Since only those special points which define the Ground Shape are Considered and, Accordingly, the Number of levelling points is reduced.

방사선사진에서의 관절간극의 의의

최순철 대한 두개하악 장애학회 1996 대한두개하악장애학회지 Vol.8 No.1

두부위치에 따른 안면골의 파노라마방사선사진상

최순철 大韓口腔顎顔面 放射線學會 1989 Imaging Science in Dentistry Vol.19 No.1

The author has evaluated the panoramic image clarity of the midfacial anatomic structures in dry skull according to the skull position. The radiopaque markers were attached to the anatomic structures: infraorbial rim, upper and lower borders of zygomatic arch, pterygomaxillary fissure, lateral pterygoid plate, pyriform aperture of nasal cavity, lateral wall of maxilla. orbital floor, infraorbital foramen, and nasal floor. Position of the skull were divided into four groups. standard, 25mm forward, chin-down, chin-up position. The results were as follows: 1. The pynform aperture of nasal cavity, lateral wall of the maxilla, orbital floor, infraobital foramen and nasal floor did not cast any discernible image. 2. Nearly all images of midfacial structures were blurred in the chin-up position. 3. The forward position provided good visualization of the maxillary sinus. 4. The chin-down position provided good visualization of the zygomatic arch, pterygomaxillary fissue, and lateral pterygoid plate.