• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2002.04a
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• pp.207-217
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• 2002

수치정사사진지도를 제작하기 위한 기반 자료로 스캐닝한 수치항공사진영상과 항공사진의 왜곡 보정을 위한 표정, DEM의 추출과 편집 및 편위 수정에 이르기까지 다양한 처리절차가 필요하다. 또한 영상과 벡티 자료의 중첩을 통해 생선한 영상지도의 편집과 지도제작 작업에는 다양한 미적 요소가 필요하다. 본 연구에서는 수치항공사진 영상을 이용하여, 영상에 내포하는 기하학적 변위를 3차원 모델링 결과와 수치표고모델을 이용하여 소거하고, 수치정사사진을 제작한 후에, 1/5,000 수치지도에서 필요한 레이어와 중첩시킨 수치정사사진지도를 제작하여 그 정확도를 분석하였으며, 각 처리 단계별 문제점의 분석과 개선방안을 제시하였다.

• Journal of the Korean Society for Precision Engineering
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• v.23 no.10
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• pp.14-21
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• 2006

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.390-390
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• 2006

• Korean Journal of Bronchoesophagology
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• v.2 no.1
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• pp.71-81
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• 1996

The normal larynx locates to the front of the neck symmetrically and the thyroid notch lies in the center of the neck, but practically the larynx is not symmetric in all people. From a clinical point of views, there are vague cases to decide whether a disordered laryngeal structure is within normal variations or a pathologic condition. The purpose of this study is to investigate the anatomy of the laryngeal framework in normal population. Authors investigate various measures of normal laryngeal framework, such as symmetry and length of the larynx, levels of the hyoid bone and vocal cord and angle of thyroid cartilage by using calipers and protractor on 45 cases of neck CT. The results are summerized as follows. 1. The laryngeal framework was asymmetric to a greater or lesser extent in most cases with directional preponderance to the right side. The degree of asymmetry did not differ among different age groups and between seres. 2. The level of the hyoid bone ranged from C2-C3 vertebrae to C5-C6 intervertebral space with most frequent level of C5. 3. The level of the vocal cord ranged from 01 vertebra to C6-C7 intervertebral space with most frequent level of C5. 4. The angle of thyroid cartilage ranged from 58 degree to 100 degree with average of 81.5 and mean angle between both thyroid alae were 77.24 degree in male and 87.88 degree in female.

• Journal of Broadcast Engineering
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• v.18 no.1
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• pp.31-42
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• 2013

This paper proposes a photogrammetric rectification method based on Bayesian approach as a method that eliminates vertical parallax between stereo images to minimize visual fatigue of 3D contents. The image rectification consists of two phases; geometry estimation and epipolar transformation. For geometry estimation, coplanarity-based relative orientation algorithm was used in this paper. To ensure robustness for mismatch and localization error occurred by automation of tie point extraction, Bayesian approach was applied by introducing several prior constraints. As epipolar transformation perspective transformation was used based on condition of collinearity to minimize distortion of result images and modification for input images. Other algorithms were compared to evaluate performance. For geometry estimation, traditional relative orientation algorithm, 8-points algorithm and stereo calibration algorithm were employed. For epipolar transformation, Hartley algorithm and Bouguet algorithm were employed. The evaluation results showed that the proposed algorithm produced results with high accuracy, robustness about error sources and minimum image modification.

• Journal of Chest Surgery
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• v.39 no.11 s.268
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• pp.868-871
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• 2006

Nuss operation as a method for correction of pectus excavatum is safe and satisfactory, but its complication presents pneumothorax, displaced bar, wound infection, pericarditis, pleural effusion, hemothorax, cardiac injury etc. We report a rare case of acute ascending aortic rupture after displaced and adhered Nuss bar removal. The patient was a 30-years old man who received Nuss operation 3 years ago. Nuss bar was removed without resistance but massively bled at both operation wound, so immediately femoro-femoral CPB and median sternotomy was done and repaired proximal aortic arch under deep hypothermic total circulatory arrest. The patient was discharged without complication at postoperative 13 day.

• Journal of Korean Society for Geospatial Information Science
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• v.1 no.2 s.2
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• pp.83-96
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• 1993

The orthophto map is seen as the form of picture with the uniform reduced scale as the current terrain map. Thus it provides a reasonable feeling of scene and is easy to be interpreted. Furthermore, digital orthophoto is currently used as the basic terrain information data of the Geo-Spatial Information System(GSIS). Therefore, the orhtophoto map has high potential use as a future terrain map. This paper studies the method of producing orthophoto map by using the digital satellite imagery data taken from SPOT satellite of France. The production of orthophoto map requires the process of generating orthophoto imagery with digital elevation model, which process is called digital differential rectification. As the final accuracy of orthophoto map depends on that of digital elevation model, the precise and efficient production method of digital elevation model should be preceded. This study investigated the method of producing digital elevation model directly from SPOT satellite imagery and generated ortho-image by resampling the original SPOT imagery through digital differential rectification. Finally, Simple orthophoto map was made by overlaying the ortho-image and the contour map from digital elevation model.

• Journal of Chest Surgery
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• v.40 no.1 s.270
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• pp.60-62
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• 2007

Pulmonary hypoplasia is an entity of pulmonary agenesis. Pulmonary agenesis is a rare congenital anomaly, usually diagnosed soon after birth. It is commonly associated with other anomalies, mainly of the cardiovascular systems. Although it may hasten the death of a child, sometimes it is compatible with normal growth. We report a right lateral thoracotomy approach for mitral valve repair in a young woman with pulmonary hypoplasia, in whom preoperative computed tomography showed severe right side shifting of the mediastinum and total collapse of the right lung.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.18 no.4
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• pp.594-606
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• 1996

This study was intended to perform the relationships between mandibualr lateral deviation in facial asymmetry patients and morphology of the cranial vault. In 30 patients(males 14, female 16) using submento-vertical cephalograms that were taken in the pre-operaticve state and posteroanterioir cephalograms that were taken in centric occlusion before, immediate and long term after surgery. 1. Mean mandibular deviation was about $-3.12^{\circ}$and mean of absolute measurement was about $2.50^{\circ}$on the submento-vertical cephalograms. 2. On the submento-vertical cephalograms, there was no significant difference between non-deviation and deviation side but it had tendency that deviation side was larger than non-deviation side on the frontal portion of cranium(Y10 to Y6) and deviation side was smaller than non-deviation on the temporal portion of cranium(Y5, Y-1 to Y-5). 3. Mean mandibular deviation was about $1.40^{\circ}$and mean of absolute measurement was about $3.95^{\circ}$on the posteroanterioir cephalograms. 4. There was statistical significance on the influence of surgical change(PT2A-PT1A) to the relapse(PTLA-PT2A)(p<0.05). The more increasing of the change, the more relapse on the posteroanterioir cephalograms. 5. There was no statistical significance on the influence of degree of mandibular deviation to morphology of the cranium on the submento-vertical cephalograms. But it had tendency that the more mandibular deviation, the larger the non-deviation side on the anterior cranium and deviation side on the posterior cranium(p>0.05). 6. There was statistical significance on the influence of the degree of mandibular deviation on the posteroanterioir cephalograms to the difference between non-deviation and deviation side. The more increasing of mandibular deviation, the larger the non-deviation side on the Y4 to Y-6(p<0.05). 7. There was no statistical significance on the influence of difference between non-deviation and deviation side to the relapse on the posteroanterioir cephalograms. But it had tendency that the more increasing of the differece between non-deviation and deviation side, the more increasing the relapse on temporal of cranium.

• The korean journal of orthodontics
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• v.39 no.1
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• pp.18-27
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• 2009

Objective: The purpose of this study was to understand the differences in masseter muscle(MM) between the shifted and non-shifted sides in facial asymmetry patients, and the changes shown by MM after mandibular surgery. Methods: Pre- and post-operative CT scans were performed on 12 Class III patients with facial asymmetry who were treated by intraoral vertical ramus osteotomy and 10 subjects with normal occlusion. Using the V-works 4.0 program(Cybermed, Seoul, Korea), 3-dimensional images of the mandible, and MM were reconstructed, and evaluated. Results: In the asymmetry group, the MM angle between the shifted and non-shifted sides was only significantly different(p<0.05). Compared with normal occlusion, the asymmetry group showed a significantly smaller volume and maximum cross-sectional area in both sides of MM(p<0.05). After mandibular surgery, the angle of MM(p<0.01) and differences in angle between the shifted and non-shifted sides of MM(p<0.05) were significantly decreased. The thickness in the maximum cross-sectional area was significantly increased(p<0.01). After surgery, MM in facial asymmetry patients was similarly changed to those in the normal occlusion group except for widths. Conclusions: MM in facial asymmetry was definitely different from those in normal occlusion. However, this study suggests that MM changed symmetrically in conjunction with the mandible after proper mandibular surgery.