• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.646-648
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• 2000

본 논문은 악안면 기형 환자의 해부학적 구조를 기반으로 하여 임상적으로 수술 결과 영상을 생성하는 방법을 제시한다. 이 방법은 환자의 평면 방사선 사진으로부터 환자의 경조직과 연조직의 외곽선을 추출하고, 이를 바탕으로 연조직 이동량 예측 함수를 이용함으로써 환자의 해부학적 특성을 고려한 가상 수술을 수행한다. 예측함수는 경조직 특징점 8개의 이동량에 따른 연조직 특징점 10개의 변화량을 함수로 만든 것으로, 100명의 임상 결과를 바탕으로 도출한 것이다. 또한 환자의 평면 방사선 사진과 특징 부위의 외곽선, 그리고 환자의 외형사진을 쉽게 정합하는 인터페이스를 제공함으로써, 환자의 가상 수술 후 결과를 평면 방사선 사진 및 측면사진으로 표현하는 특징이 있다.

• The korean journal of orthodontics
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• v.38 no.4
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• pp.252-264
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• 2008

Objective: To aid the development of a frontal image simulating program, we evaluated the soft tissue frontal changes in relationship to movement of hard tissue with orthognathic surgery of facial asymmetry patients. Methods: Preoperative and postoperative frontal cephalograms and frontal view photographs of 45 mandibular surgery patients with facial asymmetry were obtained in a standardized manner. Vertical and horizontal changes of hard tissue and soft tissue were measured from cephalograms and photographs, respectively. Soft tissue change in result to hard tissue change was then analyzed. Results: Both vertical and horizontal correlation analysis showed a weak relationship between the changes. Hard tissue points that were picked for 1 : 1 mean ratio with soft tissue points did not show any significant relevance. For each soft tissue change, regressive equation was formulated by stepwise multiple regression analysis, and the equation for soft tissue Menton was most reliable in predicting changes. Both vertical and horizontal hard tissue changes were used together in prediction of vertical or horizontal soft tissue change. Conclusions: The results suggest that computerized image simulation using regression analysis may be of help for prediction of soft tissue change, while 1:1 mean ratio method is not useful.

• Journal of Korean Academy of Oral and Maxillofacial Radiology
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• v.23 no.2
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• pp.323-332
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• 1993

저자는 1988년 6월 1일부터 1993년 6월 30일까지 서울대학교병원 치과진료부에 내원하여, 병리조직학적으로 확인된 구강악안면부 악성종양환자 35명의 방사선사진 소견과 자기공명영상 소견을 비교하여 다음과 같은 결론을 얻었다. 1. 일반적인 방사선사진소견으로는 미만성의 골파괴가 15례 (42.9%), 연조직종괴의 음영이 7례 (20,0%), 부유치를 보인 경우가 3례 (8.6%), 골경화가 2례 (51.7%)로 나타났다. 2. 자기공명영상 소견은 연조직종괴가 23례 (65.7%), 골수침범이 12례(34.5%), 피질골 파괴가 14례(40.0%), 정상피질골에 골수침범이 1례 (2.9%), 지방층소실이 19례(54.3%), 림파절전이가 8례 (22.9%), 조영증강이 15례 (42.9%), 골증식이 1례 (2.9%)였다. 3. 구강악안면부의 악성종양환자에 있어서, 방사선사진에서 관찰하기 힘들었던, 종양의 구강저, 저작근, 부인두강, 사골동, 측두하와, 악하선, 비강 등 인접조직으로의 침범여부 및 골파괴 정도와 림파절전이를 평가하는 데 자기공명영상은 도움을 주었다. 4. 정진율은, 방사선사진에서 35례중 16례로 45.7%였고, 자기공명영상에서는 35례중 27례로 77.1%로 자기공명영상의 정진율이 더 높았으나, 일반적인 방사선사진이 자기공명영상보다 더 우세한 경우도 2례 있었다.

• The korean journal of orthodontics
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• v.36 no.1 s.114
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• pp.74-83
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• 2006

Analysis of lateral cephalometric radiograph (cephalogram) has been used routinely to evaluate skeletal and dental relationships, but analysis of the lateral facial photograph has not been used frequently for evaluation of skeletal relationships. As concerns about harm of X-ray irradiation increases, this study was planned to evaluate the possibility of substituting analysis of the lateral cephalogram with analysis of the lateral facial photograph by comparing these two analyses. According to the ANB values from cephalometric analysis, subjects were divided into three groups: Class I malocclusion group (n=32). Class II malocclusion group (n=32), and Class III malocclusion group (n=31). After measurements of angles indicating horizontal and vertical relationships of the maxilla and mandible on the lateral cephalograms and photographs, differences between Class I, II and III groups were evaluated. To evaluate the similarity between two similar values in the cephalograms and photographs, t-test using standardized variable Z and correlation analysis were performed in the Class I malocclusion group. The results showed that 1) SnN'Pg' on the photograph can be used to evaluate the antero-posterior relationship of the maxilla and mandible (ANB), 2) N'-Sn/Sn-Pg' on the photograph can be used to evaluate facial convexity (NA/APg), 3) Sn-Tra-Me' on the photograph can be used as a measurement similar to FMA. In conclusion, partly substituting lateral cephalogram analysis with lateral facial photograph analysis was possible in the evaluation of the maxilla and mandible.

• KASI NEWSLETTER
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• s.20
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• pp.1-4
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• 2000

조직개편/연구원 경영성과 평가결과 "우수"/2001년 신규사업 발표회/옛 천문관측기기 간의 복원 설치/CFH의 Fahlman 대장 방문 공동 연구 논의/제 26회 별의 축제 행사 개최/제8회 천체사진 공모전 개최/천체사진 상설 전시실 개관/홈페이지 질문상자 등 운영/특별연구팀 설치/소형망원경을 이용한 천체 관측연구

• The Journal of the Korea Contents Association
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• v.10 no.8
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• pp.217-226
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• 2010

Reading a photograph is a process of perceiving the image in it. We are able to approach the intention of the photographer only from the sensory material of the image. To make sure how we see the image when we look at a photo, this paper did an experiment with Robert Doisneau's photo, 'Un Regard Oblique'. The hypothesis was set upon the idea of Mary Ann Doane, a pioneer in Gender study. Eye-tracker, Tobii was used to measure the movements and the fixation lengths of the pupils of 44 subjects. From the results of the experiment, it was verified that people look at photographic image in a certain way. At the same time, the gazing strength was differential on every subjects and subject groups.

• Journal of The Korean Radiological Technologist Association
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• v.25 no.1
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• pp.150-151
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• 1999

• Journal of The Korean Radiological Technologist Association
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• v.25 no.1
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• pp.278-282
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• 1999

• The korean journal of orthodontics
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• v.35 no.3 s.110
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• pp.163-173
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• 2005

The purpose of this study was to compare the asymmetric degree between maxillofacial hard and soft tissues in individuals with facial asymmetry. Computerized tomographies (CT) of 34 adults (17 male, 17 female) who had facial asymmetry were taken. The CT images were transmitted to personal computers and then reconstructed into three-dimensional (3D) images through the use of computer software. In order to evaluate the degree of facial asymmetry, 6 measurements were constructed as the hard tissue measurements while 6 counterpart measurements were taken as the soft tissue measurements. The means and standard deviations were obtained for each measurement using 3D measure, then t-test was used to investigate the differences between each hard tissue measurement and the corresponding soft tissue measurement All measurements used in the present study showed statistically significant differences between the hard and soft tissues. The degree of soft tissue asymmetry was smaller than that of corresponding hard tissue asymmetry in case of chin deviation, frontal ramal inclination difference, and frontal corpus inclination difference. On the other hand, the degree of soft tissue asymmetry was greater than that of underlying hard tissue asymmetry in the measurement of lip canting and lip cheilion height difference The present study suggests that asymmetric differences of hard and soft tissue is observed nu facial asymmetric subjects and thus soft tissue analysis is needed in addition to hard tissue analysis when making an evaluation of facial asymmetry.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.3
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• pp.273-278
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• 2014

On poly and single crystalline Cu substrates, the graphene was synthesized by chemical vapor deposition(CVD). Optical microscopic images which were not possible to show the detailed characterization of graphene growth were adjusted and analyzed using image analyzing software. As a result it was possible to show the detailed growth mechanism of graphene by utilizing the image analysis. Nucleation of graphene on Cu grain boundary and its growth behavior into Cu grain are shown. In addition, the movement of graphene grain boundary interacting with Cu grain boundary and pinholes during growth was illustrated in detail, and the cause and result are discussed as a result of those interactions.