당뇨병 환자에서 방수흐림의 정량적 분석

최철영,이준용,김준모,박기호,이은정,Chul Young Choi,Jun Yong Lee,Joon Mo KimKi Ho Park,Eun Jung Rhee 대한안과학회 2008 대한안과학회지 Vol.49 No.12

Purpose: We performed quantitative analysis of aqueous flare to evaluate the influence of diabetes mellitus on the flare values reflecting microvascular injuries of the retina. Methods: We compared aqueous flare values of diabetic patients without diabetic retinopathy (80 patients, 160 eyes), with those of normal control group (21 persons, 42 eyes) and diabetic retinopathy patients (20 patients, 40 eyes). The correlation between flare values and the risk factors of diabetic retinopathy was evaluated in diabetic patients without diabetic retinopathy. Results: Flare values were highest in diabetic retinopathy patients, and higher in diabetic patients without diabetic retinopathy than normal control group with statistical significance (p<0.01). Flare values were not significantly correlated with the risk factors of diabetic retinopathy. Conclusions: Microvascular injury appears to be developed in diabetic patients without diabetic retinopathy.

정상안압녹내장에서 당뇨 유무에 따라 분석한 안토시아노사이드, 은행잎추출물의 치료 효과

이용우,최철영,배정훈,김준모,Yong Woo Lee,Chul Young Choi,Jeong Hun Bae,Joon Mo Kim 대한안과학회 2014 대한안과학회지 Vol.55 No.8

Purpose: This study was performed to evaluate the effect of anthocyanoside and ginkgo biloba extract (GBE) in patients with normal tension glaucoma (NTG), according to the presence of diabetes mellitus (DM). Methods: A chart review of patients with normal tension glaucoma was retrospectively analyzed. All patients underwent a Humphrey visual field (HVF) test and logarithm of the minimal angle of resolution best-corrected visual acuity (log MAR BCVA) was measured over a 6 months period. Changes in mean deviation (MD), pattern standard deviation (PSD) of visual field and log MAR BCVA were compared among anthocyanoside, GBE and no medication (control) groups. Patients were divided according to the presence of DM. Results: A total of 406 NTG patients, including 151 DM patients, were included in the present study. MD was improved in the anthocyanoside and GBE groups, but not in the control group. PSD was not significantly different in all groups. BCVA was improved in the anthocyanoside group, but deteriorated in the control group. The results were similar in patients with or without DM. The generalized linear model demonstrated that systemic medication affected changes in visual indices. Conclusions: The results from the present study suggest that anthocyanoside and GBE may be helpful for improving visual function in some patients with NTG regardless of their DM status. J Korean Ophthalmol Soc 2014;55(8):1174-1179

국산 애니메이션 영화에서 3D《대성귀래》의 성공에 대한 연구

류징(LiuJing),최철영(Choi Chul-yong) 한국애니메이션학회 2015 한국애니메이션학회 학술대회지 Vol.2015 No.11

3D 프린팅 기술의 이용에 관한 특성 분석

옌지후이(Yan JIHui),최철영(Choi Chul-yong) 한국애니메이션학회 2015 한국애니메이션학회 학술대회지 Vol.2015 No.11

3D 컴퓨터 애니메이션 제작에서 Cloth Simulation을 위한 제작파이프라인의 최적화

곽동민(Dong-Min Kwak),최철영(Chul-Yong Choi),김기홍(Ki-Hong Kim),이동훈(Dong Hoon Lee) 한국콘텐츠학회 2009 한국콘텐츠학회논문지 Vol.9 No.8

최근 콘텐츠 영상으로서 3D 컴퓨터 애니메이션의 발전과 함께 클로스 시뮬레이션(Cloth Simulation)은 사실적인 의상과 의류에 대한 표현이 가능하다. 또한 H/W와 S/W의 눈부신 발달로 인해 기존과 달리 참여도와 접근성이 높아 졌다. 하지만 높은 품질의 영상을 제작하기 위해서는 최적화된 제작 파이프라인이 필요하다. 본 논문에서는 기존의 3D 컴퓨터 애니메이션 제작 파이프라인의 단점을 보완하기 위해서 클로스시뮬레이션에 대한 최적화된 제작 파이프라인을 제안 및 설계 한다. 제안하는 제작 파이프라인은 기존 파이프라인의 각 파트에 대한 연계구조적 한계를 보완하기 위해 유동성을 고려하여 최적화 배치를 하고, Dummy cloth를 활용하여 애니메이션 파트와의 연계성을 해결함으로서 성능 향상을 꾀한다. 제안한 파이프라인을 실제 애니메이션 제작에 도입하였으며 도입결과 제작시간과 제작인력 소모에 대한 성능의 향상을 보였다. 이를 통해 직접적인 영상을 제작함으로 보다 연계성을 강조하여 최적화를 보장한다. Recently, it was possible to represent the realistic clothes in the cloth simulation along with growth of 3D computer animation such as visual contents. In addition, because of the development of H/W(Hardware) and S/W(Software), the accessibility and participation are growing. However, in order to make the image of high quality of 3D animation, the optimized production pipeline was need. In this paper, in order to overcome the limitation of exiting 3D computer animation production pipeline, we propose the optimized production pipeline of the cloth simulation. Our production pipeline makes the optimization arrangement in consideration of the mobility in order to supplement the related structure limit toward each part of the existing pipeline. Moreover, by utilizing the dummy cloth the association nature with the animation part is solved and a performance is improved. The proposal pipeline actually introduced to the animation production. And then we can improve the performance production time and production manpower consumption. Consequently, our pipeline is guaranteed an optimized work by emphasizing a connection in the direct image production

〈대성귀래〉를 통해본 중국 전통 스타일 연구

마칭(Ma qing),최철영(Choi chul-yong) 한국콘텐츠학회 2016 한국콘텐츠학회 종합학술대회 논문집 Vol.2016 No.5

에너지 절감형 평형수 처리장치 개발에 관한 연구 (Ⅰ)

박대원(Dae-Won Park),길경석(Gyung-Suk Kil),최용기(Yong-Ki Choi),최철영(Chul-Young Choi),장지호(Jiho Chang),천상규(Sang-Gyu Cheon) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회지 Vol.34 No.6

흡입화상 환자에서의 폐기능검사 소견

김종엽 ( Jong Yeop Kim ),김철홍 ( Cheol Hong Kim ),신현원 ( Hyun Won Shin ),채영제 ( Young Je Chae ),최철영 ( Chul Young Choi ),신태림 ( Tae Rim Shin ),박용범 ( Yong Bum Park ),이재영 ( Jae Young Lee ),반준우 ( Joon Woo Bahn ) 대한결핵 및 호흡기학회 2006 Tuberculosis and Respiratory Diseases Vol.60 No.6

연구배경: 흡입화상은 폐렴, 호흡부전 등의 폐합병증으로 인해 이환율 및 사망률 증가에 기인하는 것으로 알려져 있다. 화기 흡입에 의한 기도 손상이 폐기능에 영향을 줄 것으로 예상되나 이에 대한 연구는 빈약한 실정이다. 흡입화상으로 인한 폐기능 검사소견의 변화를 알아보고자 하였다. 방법: 2002년 8월부터 2005년 8월까지 기관지내시경검사에 의해 흡입 폐 손상이 확인된 환자들을 대상으로 급성기 및 회복기에 폐기능 검사를 시행하여 비교 및 분석하였다. 초기 폐기능 검사에서 FVC, FEV1, FEV25-75% 및 PEF의 정상 추정치는 흡입화상에 대한 내시경적 중증도와의 상관성을 알아보았다. 사망환자, 연기 흡입으로 뇌손상을 입은 환자 및 선행 만성 호흡기질환자는 제외하였다. 결과: 화상체표면적이 0-18%의 범위에 있는 총 37명(남 28, 여 9)의 환자를 대상으로 하였다. 내원 당시의 PaO2/FiO2 비는 286.4±129.6 ㎜Hg, COHb은 7.8±6.6%였으며, 기관내 삽관은 9예(24.3%), 기계호흡은 3예(8.1%)에서 이루어졌다. 초기 방사선 소견에서 이상 소견을 보인 18예(48.6%) 중 15예(83.3%)는 정상화되었으나 3예(16.7%)는 잔흔을 남기고 치유되었다. 초기 폐기능 검사에서 19예(51.4%)가 정상 소견이었다. 폐쇄성 장애가 9예(24.3%) 있었으며 이 중 4예(44.4%)는 기관지 확장제에 양성반응을 보였다. 제한성 장애도 9예(24.3%) 관찰되었다. DLco를 시행한 23예 중 4예(17.4%)만이 감소된 소견을 보여 주었다. 추적 폐기능 검사에서 초기에 이상 폐기능 소견을 보인 대부분이 정상으로 회복되었으며, 폐쇄성 및 제한성 장애가 각각 1예(2.7%)씩 관찰되었다. DLco는 전부 정상화 되었다. 결론: 흡입화상 이후 생존한 환자를 대상으로 급성 호흡기 증상이 안정된 상태에서 시행한 초기 폐기능 검사상 정상, 폐쇄성 및 제한성 장애로 나타나 특이적인 환기장애 양상은 관찰되지 않았다. 또한 초기에 이상소견을 보여주었다 하더라도 추적검사에서 대부분 정상으로 회복되는 것을 관찰할 수 있었다. 그리고, 기관지확장제 양성을 보이는 일부 환자는 기관지 확장제 치료를 적극적으로 시도해 볼 수 있을 것으로 사료된다. Background: The changes in the pulmonary function observed in burn patients with an inhalation injury are probably the result of a combination of airway inflammation, chest wall and muscular abnormalities, and scar formation. In addition, it appears that prolonged ventilatory support and an episode of pneumonia contribute to the findings. This study investigated the changes in the pulmonary function in patients with inhalation injury at the early and late post-burn periods. Methods: From August 1, 2002, to August 30, 2005, surviving burn patients who had an inhalation injury were enrolled prospectively. An inhalation injury was identified by bronchoscopy within 48hours after admission. Spirometry was performed at the early phase during admission and the recovery phase after discharge, and the changes in the pulmonary function were compared. Results: 37 patients (M=28, F=9) with a total burn surface area (% TBSA), ranging from 0 to 18%, were included. The initial PaO2/FiO2ratio and COHb were 286.4±129.6㎜Hg and 7.8±6.6%. Nine cases (24.3%) underwent endotracheal intubation and 3 cases (8.1%) underwent mechanical ventilation. The initial X-ray findings revealed abnormalities in, 18 cases (48.6%) with 15 (83.3%) of these being completely resolved. However, 3 (16.7%) of these had residual sequela. The initial pulmonary function test, showed an obstructive pattern in 9 (24.3%) with 4 (44.4%) of these showing a positive bronchodilator response, A restrictive pattern was also observed in 9 (24.3%) patients. A lower DLco was observed in only 4 (17.4%) patients of which 23 had undergone DLco. In the follow-up study, an obstructive and restrictive pattern was observed in only one (2.7%) case each. All the decreased DLco returned to mormal. Conclusions: Most surviving burn patients with an inhalation injury but with a small burn size showed initial derangements in the pulmonary function test that was restored to a normal lung function during the follow up period. (Tuberc Respir Dis 2006; 60: 653-662)

광폭 인공수정체 SuperflexⓇ의 임상성적

한인균(In Kyun Hahn),선재홍(Jae Hong Sun),조수근(Soo Geun Joe),김재용(Jae Yong Kim),김명준(Myoung Joon Kim),최철영(Chul Young Choi),박혜영(Hye Young Park),차흥원(Hungwon Tchah) 대한검안학회 2016 Annals of optometry and contact lens Vol.15 No.4

Purpose: To evaluate the clinical outcomes after in the bag insertion of Superflex?? intraocular lens (IOL) which has 0.25 mm bigger optic diameter than the conventional IOL. Methods: Retrospective chart review was performed for 15 eyes of 13 patients who had undergone phacoemulsification with in the capsular bag insertion of Superflex?? IOL (experimental group) and for 28 eyes of 25 patients with in the bag insertion of Akreos?? (control group). Best-corrected visual acuity (BCVA), manifest refraction, refractive error (RE; [postoperative spherical equivalent]–[preoperative target refraction]), corneal topography, higher-order aberration and contrast sensitivity were measured preoperatively and at 1 week, 1 month and 3 months postoperatively. Their changes after surgery were compared between both groups. Results: At 3 months after the surgery, RE was 0.22 ± 0.39 D in the experimental group and -0.17 ± 0.58 D in the control group, showing more hyperopic RE in the experimental group than the control group (p=0.007). BCVA, spherical equivalent, higher-order aberration, contrast sensitivity, and anterior chamber depth had no significant difference between two groups at 1 week, 1 month, and 3 months after the surgery. Conclusions: Superflex?? IOL showed no significant difference in the clinical outcomes compared with Akreos?? IOL until 3 months after the surgery. However, the target refraction of Superflex?? IOL should be considered more myopic, since its postoperative refraction would be hyperopic.