경두개방사선사진과 자기공명영상을 이용한 측두하악관절 골변화에 관한 연구

조수범,고광준,Cho Su-Beom,Koh Kwang-Joon 대한영상치의학회 2002 Imaging Science in Dentistry Vol.32 No.2

Purpose: To evaluate the diagnostic accuracy of transcranial radiographs and magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) in the assessment of osseous changes of the condylar head and articular eminence. Materials and Methods: Osseous changes of the TMJ were evaluated in forty-three patients. Osseous changes of the condylar head and articular eminence were observed in 41 joints and 64 joints, respectively on transcranial radiographs, and 48 joints and 59 joints, respectively on MRI. Results: The flattening, sclerosis, erosion, and osteophyte formation of the condylar heads were observed in 36.6%, 43.9%, 12.2%, and 7.3%, respectively on transcranial radiographs compared with 35.4%, 20.8%, 37.5%, and 6.3%, respectively on MRI. While, the flattening, sclerosis, and erosion of the articular eminences were observed in 26.6%, 67.2%, and 6.2%, respectively on transcranial radiographs compared with 32.2%, 59.3%, and 8.5%, respectively on MRI. Conclusion: There were no statistical differences between transcranial radiographs and MRI scans in the detection of osseous changes of the TMJ. However, MRI scans were superior to the transcranial radiographs in the detection of erosion of the condylar head (p<0.01).

Susceptibility-Weighted MR Imaging for the Detection of Developmental Venous Anomaly: Comparison with T2 and FLAIR Imaging

조수범,최대섭,유현규,신화선,김지은,최혜영,박미정,최호철,손승남 대한자기공명의과학회 2014 Investigative Magnetic Resonance Imaging Vol.18 No.3

Purpose : We evaluated the diagnostic value of susceptibility-weighted imaging (SWI) for the detection of developmentalvenous anomaly (DVA). Materials and Methods: Retrospective review of 1068 brain MR examinations found 28 DVAs in 28 patients (2.6%) oncontrast-enhanced T1-weighted images. SWI, T2, and FLAIR images of 28 patients with DVA and 28 sex- and agematchedcontrol patients without DVA were analyzed by blinded readers on each type of sequences. All images wereindependently reviewed by two radiologists who were blinded to other MR imaging finding. In cases of discrepancy, tworeviewers reached a consensus later. The sensitivity, specificity, positive predictive value (PPV), and negative predictivevalue (NPV) of each MR sequence for the detection of DVA were determined. Statistical analysis was performed by usingthe Mcnemar test. The significance level was p < 0.05. Results: The sensitivity, specificity, PPV, and NPV of SWI for the detection of DVA were 85.7%, 92.9%, 92.3%, and86.7%, respectively. T2 and FLAIR images showed sensitivity of 35.7% and 35.7%, specificity of 92.9% and 96.4%, PPVof 83.3% and 90.9%, and NPV of 59.1% and 60.0%, respectively. On SWI, the sensitivity and NPV for the detection ofDVAs were significantly higher than those of T2 and FLAIR images (p < 0.05). Conclusion: SWI was sensitive and specific for the detection of DVA.

마이크로-광스위치 제작을 위한 다결정실리콘 식각 공정의 최적화

조수범,이경철,이민우,오범환,이승걸,박세근,이일항,류한권,이현삼 한국통신학회 2002 한국통신학회 기타 간행물 Vol.2002 No.10

Enhanced-Inductively Coupled Plasma (E-ICP)를 이용한 Silylated photoresist 식각공정개발

조수범,김진우,정재성,오범환,박세근,이종근 한국전기전자재료학회 2002 전기전자재료학회논문지 Vol.15 No.3

The silylated photoresist etch process was tested by enhanced-ICP. The comparison of the two process results of micro pattern etching with $0.35\mu\textrm{m}$ CD by E-ICP and ICP reveals that I-ICP has bettor quality than ICP. The etch rate and the RIE lag effect was improved in E-ICP. Especially, the problem of the lateral etch was improved in E-ICP.

자기공명영상을 이용한 악관절내장증환자와 악관절증환자의 골변화에 관한 연구

조수범,고광준 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.3

Purpose : To evaluate the osseous changes of TMJ in internal derangement and osteoarthritis patients using MRI. Materials and Methods : MR images of 111 TMJs in 64 patients were analyzed to evaluate the osseous changes. 111 TMJs were divided into 6 groups according to the radiologic Stages by Schellhas and Wilkes. On MR images, we evaluate the osseous changes of articular eminence and condylar head. Results : The most frequent Stage in internal derangement of TMJ was Stage I. And 28 joints (25.2%) revealed osteoarthritis with internal derangement. When osseous change of articular eminence and condylar head occur, flattening was the most common osseous change. Sclerosis was observed in all Stages and osteophytosis of condylar head was observed in Stage II(1.8%) and III(0.9%). Out of 28 joints with osteoarthritis,6 joints(21.4%) showed joint effusion. Conclusion : MR image revealed abnormal configuration of disk, but the detection of minimal osseous change was subtle.(Korean J Oral Maxillofac Radiol 2001; 31 : 159-64)

상, 하악골에 발생된 개화성골이형성증

조수범,고광준,Cho Su-Beom,Koh Kwang-Joon 대한영상치의학회 1995 Imaging Science in Dentistry Vol.25 No.1

Few cases of florid osseous dysplasia has been described as a condition that characteristically affects the jaws. It usually manifests as multiple radiopaque masses distributed throughout the jaws. Confusion exists about the relationship of florid osseous dysplasia, gigantiform cementoma, chronic sclersing osteomyelitis, sclerosing osteitis or multiple enostosis. Authors experienced a case of florid osseous dysplasia of the jaws in 52-year-old female on the basis of clinical, radiographic and histopathologic findings. The characteristic features are as follows : 1. In clinical examination, there was no clinical sign and symptoms except extracted area. And there was no facial asymmetry. 2. Radiograms show round or lobular dense radiopaque masses surrounded by radiolucent bands in lower molar teeth area bilaterally. And slight increased radiopacities in maxillary molar teeth area bilaterally. There was no expansion or thinning of buccal and lingual cortical bones. There is no displacement or resorption of involved teeth. In right side of mandible, mandibular canal is displaced inferiorly due to mass. 3. Photomicrograms show densely mineralized sclerotic acellular masses with empty lacunae. Pattern is suggestive of cementum, although it could be considered sclerotic bone. In the periphery, lesion consisting of moderately cellular fibrous tissue in which globular calcified products are deposited.

MC3T3-E1 조골세포주의 osteocalcin과 osteopontin mRNA 발현에 미치는 방사선의 영향

조수범,이상래,고광준,Cho Su-Beom,Lee Sang-Rae,Koh Kwang-Joon 대한영상치의학회 2003 Imaging Science in Dentistry Vol.33 No.3

Purpose: To investigate the effects of irradiation on the phenotypic expression of the MC3T3-El osteoblastic cell line, particularly on the expression of osteocalcin and osteopontin. Materials and Methods: Cells were irradiated with a single dose of 0.5, 1,4, and 8 Gy at a dose rate of 5.38 Gy/min using a cesium 137 irradiator. After the specimens were harvested, RNA was extracted on the 3rd, 7th, 14th, and 21st day after irradiation. The RNA strands were reverse-transcribed and the resulting cDNAs were subjected to amplification by PCR. Results: The irradiated cells demonstrated a dose-dependent increase in osteocalcin and a dose-dependent decrease in osteopontin mRNA expression compared with the non-irradiated control group, The amount of osteocalcin mRNA expression decreased significantly at the 3rd day after irradiation of 0,5, 1,4, and 8 Gy, and also decreased significantly at the 3rd, 14th, and 21 st day after irradiation in the 8 Gy exposed group compared with the control group, The degree of osteopontin mRNA expression increased significantly at the 7th day after irradiation of 0,5, 1,4, and 8Gy, Conclusion: These results showed that each single dose of 0,5, 1, 4, and 8 Gy influenced the mRNA expression of osteocalcin and osteopontin associated with the calcification stage of osteoblastic cells, suggesting that each single dose affected bone formation at the cell level.

범용성 유도결합 플라즈마 식각장비를 이용한 깊은 실리콘 식각

조수범,박세근,오범환 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.7

High aspect ratio silicon structure through deep silicon etching process have become indispensable for advanced MEMS applications. In this paper, we present the results of modified Bosch process to obtain anisotropic silicon structure with conventional Inductively Coupled Plasma (ICP) etcher instead of the expensive Bosch process systems. In modified Bosch process, etching step ($SFsub6$) / sidewall passivation ($Csub4Fsub8$) step time is much longer than commercialized Bosch scheme and process transition time is introduced between process steps to improve gas switching and RF power delivery efficiency. To optimize process parameters, etching ($SFsub6$) / sidewall passivation ($Csub4Fsub8$) time and ion energy effects on etching profile was investigated. Etch profile strongly depends on the period of etch / passivation and ion energy. Furthermore, substrate temperature during etching process was found to be an important parameter determining etching profile. Test structures with different pattern size have been etched for the comparison of the aspect ratio dependent etch rate and the formation of silicon grass. At optimized process condition, micropatterns etched with modified Bosch process showed nearly vertical sidewall and no silicon grass formation with etch rate of 1.2 ${\mu}{\textrm}{m}$/ min and the size of scallop of 250 nm.

하악과두골절 환자의 일반방사선사진상과 전산화단층사진상의 비교 연구

조수범,고광준,Cho Su-Beom,Koh Kawng-Joon 대한영상치의학회 1995 Imaging Science in Dentistry Vol.25 No.2

The subjects of this study consisted of 75 patients with 83 condylar fractures, who were admitted to Chonbuk National University Hospital from Jan. 1988 to Oct. 1995. The purpose of this study was to compare the imagings of conventional radiograms with those of computed tomograms and to aid in the diagnosis of condylar fractures. Also the author evaluated the usefulness of 3-dimensional reconstructive imaging in condylar fractures. The obtained results were as follows: 1. The condylar fractures were observed mainly between 2nd and 4th decades, but there was no significant difference of incidence between decades. The incidence of condyalr fractures by fracture site was subcondyalr(44.6%), condylar head(36.1%), condylar neck(19.3%) in orders. 12 of 30 condylar head fractures were sagittal splitting fractures. 2. According to the relationship of condylar head to articular fossa, the incidence of condylar fractures was higher in Type II and Type m. And the incidence of subcondylar fractures was higher in Type I classified by Mclennan. But there was no significant difference of incidence between Types. 3. The more the fracture fragments were displaced, the easier the fracture patterns were detected in conventional radiograms. The computed tomograms were also useful in the diagnosis of sagittal splitting fractures which were displaced mesially. 4. The 3-dimensional reconstructive imaging were useful in the evaluation of the fracture patterns, but they were not useful when the size of fragment and the degree of displacement were small.

실리콘 마스터 제작과 UV 엠보싱공정의 효율성 개선

조수범,임경진,박세근,이승걸,이일항,오범환 한국통신학회 2004 한국통신학회 기타 간행물 Vol.2004 No.11