특발성 망막앞막에서 유리체황반견인증후군 유무에 따른 수술 결과

문종원,장지혜,조영욱,Jong Won Moon,Ji Hye Jang,Young Wook Cho 대한안과학회 2014 대한안과학회지 Vol.55 No.12

Purpose: To present preoperative macular structure deformities and surgical outcomes in idiopathic epiretinal membrane (ERM) patient according to the presence of vitreomacular traction syndrome (VMTS). Methods: This retrospective observational study included 54 eyes of 51 patients with idiopathic ERM, who underwent pars plana vitrectomy with ERM and internal limiting membrane (ILM) peeling, and were followed for more than 6 months. Subjects were classified into 2 groups according to the presence of VMTS using preoperative optical coherence tomography (group 1: ERM without VMTS, 29 eyes; group 2: ERM with VMTS, 22 eyes). Preoperative macular structure deformity and surgical outcomes were compared and prognostic factors were analyzed. Results: Group 1 (ERM without VMTS) included 29 eyes, and group 2 (ERM with VMTS) included 22 eyes. Group 2 had a significantly higher occurrence of lamellar macular hole and a significantly lower preoperative best-corrected visual acuity (BCVA) compared to group 1. However, final postoperative BCVAs were not significantly different between the groups because BCVA changed more in group 2. Preoperative macular structure deformities (irregular retinal surface, retinal thickening, lamellar macular hole, and cystoid macular edema) did not affect visual outcomes. The presence of photoreceptor inner segment/outer segment (IS/OS) junction disruption and preoperative BCVA were highly related with visual outcomes. Conclusions: BCVA significantly improved in idiopathic ERM patients who underwent pars plana vitrectomy with ERM and ILM peeling regardless of the presence of VMTS. There may be a stronger association of IS/OS junction disruption with visual acuity compared to VMTS in idiopathic ERM surgery. J Korean Ophthalmol Soc 2014;55(12):1834-1842

광역 용수계통을 고려한 농업용수 필요수량의 산정 - 섬진강댐 수혜구역을 중심으로 -

문종원 ( Moon Jong Won ),정진호 ( Chung Jin Ho ),장중석 ( Jang Jung Seok ) 한국농공학회 2003 한국농공학회 학술대회초록집 Vol.2003 No.-

The purpose of this paper is to estimate Agricultural water demand at irrigation area of sumjin reservoir, the Dongjin River basin, which consist of multi-wide water supply system and complicated irrigation channel and supplementary irrigation facilities.

모바일 환경을 위한 딥러닝 기반 열화상 이미지 마스크 인식 및 교차 엔트로피를 이용한 클래스 분류

문종원(Moon, Jong-Won),윤호섭(Yoon, Ho-Sub) 대한전자공학회 2022 전자공학회논문지 Vol.59 No.1

전세계적 전염병인 COVID-19로 인하여 군중에서 열이 높은 일부 인원을 검출하기 위한 비접촉식 열화상 시스템의 수요가 증가하였다. 공공장소에서 마스크 착용이 의무화되었고 입구마다 관리 인원을 두어 출입을 통제하고 있는 상황속에서, 최소한의 인원으로 원활하게 통제하려면 카메라 등으로 관리를 해야 하는데 일반적으로 우리가 사용하는 RGB 이미지에서 마스크를 탐지하는 것은 열화상 이미지에서 탐지하는 것 보다 여러 가지 단점을 갖고 있다. 본 논문에서는 열화상 이미지 사용의 장점과 더불어 모바일 환경에서도 충분히 사용이 가능한 경량화된 딥러닝 모델을 사용하여 이를 바탕으로 딥러닝 기반 열화상 이미지 마스크 인식에 대해서 소개한다. 또한 마스크 착용, 미착용의 이진 분류에서 더 나아가 턱에 걸치거나 코에 걸치는 애매한 경우까지 하나로 묶어 3가지의 형태를 분류하는 모델도 소개한다. 우리가 들고 다니는 일반적인 휴대폰에서도 실시간으로 사용할 수 있게 매우 경량화된 모델을 사용하였는데 마스크 인식 문제는 비교적 간단한 분류 문제이기 때문에 경량화된 네트워크로도 좋은 성능을 낼 수 있다. COVID-19, a global infectious disease, has increased the demand for contactless thermal imaging systems to detect some people with high heat in the crowd. In public places, mask-wearing is mandatory and access is restricted with management personnel at each entrance, to control smoothly with a minimum number of people, detecting masks from RGB images generally has more disadvantages than detecting them from thermal images. In addition to the advantages of using thermal images, this paper introduces deep learning-based thermal image mask detection based on using a lightweight deep learning model that can be sufficiently used in mobile environments. A very lightweight model is used for real-time use even in ordinary mobile phones, but the problem of mask detection is a relatively simple binary classification problem.

CBAM 모듈을 이용한 얼굴인식 성능 향상

문종원(Jong-Won Moon),윤호섭(Ho-Sub Yoon) 대한전자공학회 2022 대한전자공학회 학술대회 Vol.2022 No.6

LIIF를 이용한 데이터 증강을 통한 복합 해상도 얼굴 인식 성능 향상

문종원(Jong-Won Moon),윤호섭(Ho-Sub Yoon) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

For mobile devices or robots, low-resolution images can have asignificant impact on recognition performance, especially facial recognition. Lowresolution images can cause performance degradation when used as input to various recognition models and may not behave as intended. If the image quality is poor, facial features cannot be extracted properly and it is difficult to determine emotions, age, identity, etc. These issues make it difficult to communicate and perform the intended function, assuming there is any interaction with the user. In this paper, we show how data augmentation with Local Implicit Image Function(LIIF[1]) can be used to increase performance on mixed-resolution datasets without sacrificing high-resolution datasets performance when training.

건강한 여아에서 발생한 황반부를 침범한 급성 망막분지동맥폐쇄 1예

장지혜,문종원,조영욱,Ji Hye Jang,MD,Jong Won Moon,MD,Young Wook Cho,MD 대한안과학회 2014 대한안과학회지 Vol.55 No.2

Purpose: We report a case of branch retinal artery occlusion (BRAO) interconnected with the perifoveal capillaries in a healthy young female. Case summary: A 16- year- old female presented with sudden loss of vision in her left eye. Upon initial examination, her left visual acuity was 0.02 and intraocular pressure was 31 mm Hg. Fundus examination revealed pallid retinal edema of the inferior posterior pole and retinal hemorrhage below optic disc. Ocular massage followed by anterior chamber paracentesis was performed for 30 minutes within 4 hours after the onset of vision loss. Fluorescein angiography (FAG) showed a very slow blood flow in the superotemporal and inferotemporal retinal arteries and a delay in retinal arteriovenous transit time. We performed hemodynamic tests such as blood pressure, echocardiography, and the hematologic test for thrombogenicity and all tests were normal. At three weeks after treatment, vision in the left eye was 0.7 and FAG revealed normal retinal arterial circulation and venous drainage time. Conclusions: This is the first report regarding acute BRAO in a healthy Korean child without any detectable systemic disorder. Prompt treatment can prevent permanent visual loss in BRAO involving the macular area. J Korean Ophthalmol Soc 2014;55(2):304-308

한국 소아의 정상안에서 빛간섭단층혈관조영술을 이용한 황반부 혈관 분석

전태하(Tae Ha Jun),문종원(Jong Won Moon) 대한안과학회 2022 대한안과학회지 Vol.63 No.1

목적: 한국 소아의 정상안에서 빛간섭단층혈관조영술을 이용하여 황반 미세혈관구조에 대해 분석하고 나이에 따른 표준자료를 얻고자 하였다. 대상과 방법: 3-15세 이하의 소아 68명(126안)을 대상으로 의무기록을 후향적으로 분석하였다. 황반을 중심으로 한 3-mm2 면적에 대한 빛간섭단층혈관조영술을 시행하였다. 표층 및 심부모세혈관총의 혈관밀도와 망막중심오목무혈관부위 면적을 측정하여 나이군별로 나누어 분석하였다. 나이, 성별, 안축장 및 구면렌즈대응치와의 상관관계를 비교 분석하였다. 결과: 나이군에 따라 3-5, 6-8, 9-11, 그리고 12-15세로 나누어 비교하였을 때 표층모세혈관총 중심오목혈관밀도는 각각 17.41 ± 5.41, 20.53 ± 4.76, 21.78 ± 5.73, 그리고 22.95 ± 3.91%였다. 심부모세혈관총 중심오목혈관밀도는 각각 30.20 ± 6.59, 34.54 ± 7.16, 35.81 ± 6.02, 그리고 37.38 ± 5.16%로 통계적으로 유의한 차이를 보였다(p=0.002, p<0.001). 안축장은 표층모세혈관총과 심부모세혈관총의 중심오목 혈관밀도와는 양의 상관관계(R2=0.153, p<0.001; R2=0.158, p<0.001), 망막중심오목무혈관부위 면적과는 음의 상관관계를 보였다(R2=0.085, p<0.001). 결론: 한국 소아의 정상안에서 빛간섭단층혈관조영술로 측정한 표층 및 심부모세혈관총의 혈관밀도는 나이군별 차이가 있었으며, 안축장과 유의한 상관관계를 보였다. Purpose: We used optical coherence tomography angiography to analyze the macular microvasculature of normal eyes of healthy Korean children; we derived normative data stratified by age. Methods: We retrospectively analyzed the medical records of 68 children (126 eyes) aged from 3 to 15 years. Optical coherence tomography angiography was performed on 3-mm2 regions centered on the fovea. The vascular densities of the superficial and deep capillary plexuses and the foveal avascular zone were determined, and analyzed by age. We sought correlations between age, gender, axial length, and the spherical equivalent. Results: The foveal, superficial capillary plexus vessel densities were 17.41 ± 5.41, 20.53 ± 4.76, 21.78 ± 5.73, and 22.95 ± 3.91% in children aged 3-5, 6-8, 9-11, and 12-15 years, respectively. The vessel densities of the foveal deep capillary plexus were 30.20 ± 6.59, 34.54 ± 7.16, 35.81 ± 6.02, and 37.38 ± 5.16% in those aged 3-5, 6-8, 9-11, and 12-15 years, respectively. Significant differences by age were apparent (p = 0.002, p < 0.001, respectively). The foveal vessel densities of the superficial and deep capillary plexuses were positively correlated with axial length (R2 = 0.153, p < 0.001; R2 = 0.158, p < 0.001, respectively) and the foveal avascular zone area was negatively correlated with axial length (R2 = 0.085, p < 0.001). Conclusions: The vessel densities of the superficial and deep capillary plexuses measured via optical coherence tomography angiography in normal eyes of healthy Korean children differed by age, and correlated significantly with axial length.

소아에서 발생한 특발성 시신경교차염

전재평(Jae Pyeong Jeon),이동훈(Donghun Lee),문종원(Jong Won Moon) 대한안과학회 2021 대한안과학회지 Vol.62 No.12

목적: 특발성 시신경교차염으로 진단된 소아 환자의 임상양상과 치료 결과를 보고하고자 한다. 증례요약: 기저질환이 없는 13세 남아가 내원 5일 전부터 시작된 양안의 시력저하로 내원하였다. 최대교정시력은 우안 0.08, 좌안 안전수지 30 cm였고, 안저검사에서 양안의 경미한 시신경유두부종이 관찰되었으며, 시야검사에서 우안 이측반맹, 좌안 전맹 소견을 보였다. 뇌 자기공명영상촬영에서 시교차 부위에 결절성 조영증강이 확인되었다. 뇌척수액 및 혈액검사에서 감염과 자가면역질환의 증거는 없었다. 따라서 특발성 시신경교차염으로 진단하였고 고용량 스테로이드 치료를 시작하였다. 치료 후 5일째 양안의 시력이 호전되기 시작했으며, 1개월째 시야결손은 작은 중심암점만 남기고 거의 소실되었으며, 유두부종은 거의 관찰되지 않았다. 치료 후 4개월째인 현재까지 재발 없이 안정적인 경과를 보이고 있고, 시력은 정상으로 호전되었다. 결론: 소아에게서 발생한 특발성 시신경교차염에 대해 스테로이드 치료를 시행하였으며, 시기능은 정상 범위로 회복되었다. 중추신경계 탈수초질환을 시사하는 소견은 확인되지 않았으나, 지연성으로 발생할 수 있는 가능성을 염두에 두고 지속적인 경과 관찰이 필요하다. Purpose: We report a case of idiopathic chiasmal optic neuritis in a pediatric patient. Case summary: A 13-year-old boy with no history of systemic disease was referred to our ophthalmology clinic because of visual disturbance in both eyes of 5 days in duration. The best-corrected visual acuity was 0.08 in the right eye and finger counting at 30 cm in the left eye; mild blurring of the disc margins (both eyes) was evident on fundus examination, as were temporal hemianopsia in the right eye and diffuse field loss in the left eye. Brain magnetic resonance imaging revealed focal nodular enhancement in the optic chiasm. Blood and cerebral fluid analysis yielded no evidence of infection or autoimmune disease. Therefore, we diagnosed isolated idiopathic chiasmal optic neuritis and commenced a systemic steroid. After 5 days, the visual acuity began to improve, and the field defect was almost eliminated (except for a small central scotoma) at 1 month. He has remained stable to the time of writing (4 months after treatment) and his visual acuity has normalized. Conclusions: Isolated idiopathic chiasmal optic neuritis developed in a pediatric patient and the visual function improved after steroid treatment. Although there was no evidence of systemic demyelinating disease, regular observation is scheduled given the possibility of late-onset disease.

결절맥락막혈관병증에서 중심맥락막두께에 따른 애플리버셉트 유리체강내주입술의 효과 분석

이동훈(Dong hun Lee),정성용(Seong yong Jeong),문종원(Jong won Moon),이준엽(Jun yeop Lee),사공민(Min Sa gong) 대한안과학회 2016 대한안과학회지 Vol.57 No.10

목적: 결절맥락막혈관병증 환자에서 중심맥락막두께에 따른 애플리버셉트 유리체강내주입술의 효과 차이를 분석하고자 하였다. 대상과 방법: 본원에서 결절맥락막혈관병증으로 진단 받고 애플리버셉트 유리체강내주입술을 받은 환자 중 6개월 이상 경과 관찰이 가능했던 60명 60안의 의무기록을 후향적으로 분석하였다. 주사 전 측정한 중심맥락막두께에 따라 얇은 군, 중간 군, 두꺼운 군으로 나누고 주사 후 6개월 동안의 최대교정시력, 중심맥락막두께, 중심황반두께 및 최대 망막색소상피박리 높이의 변화와 3개월째 결절 폐쇄율, 6개월째 황반부종 소실률을 비교 분석하였다. 결과: 총 60안 중 얇은 군은 14안(23.3%), 중간 군은 33안(55.0%), 두꺼운 군은 13안(21.7%)이었으며, 주사 전 평균 중심맥락막두께는 각각 178.50 ± 28.42 μm, 287.03 ± 43.58 μm, 379.77 ± 17.09 μm였다. 세 군 간 초진 시 연령, 성비, 최대교정시력, 중심황반두께 및 최대 망막색소상피박리 높이는 유의한 차이가 없었다. 치료 6개월 후 최대교정시력은 얇은 군에서만 유의한 호전을 보였고 (p=0.005) 중간 군과 두꺼운 군에서는 호전은 되었지만 통계적 유의성은 없었다(p=0.063, p=0.692). 중심맥락막두께, 중심황반두께 및 최대 망막색소상피박리 높이는 세 군 모두에서 유의한 감소를 보였다. 중심맥락막두께가 얇을수록 첫 주사 후 3개월째 완전 결절 폐쇄율과 6개월째 황반부종 소실률이 높았다(p=0.013, p=0.004). 결론: 애플리버셉트 유리체강내주입술은 결절맥락막혈관병증의 치료에 있어서 효과적이었고, 중심맥락막두께가 얇을수록 더 좋은 치료 결과를 보였다. <대한안과학회지 2016;57(10):1577-1585> Purpose: To evaluate the effect of intravitreal aflibercept according to subfoveal choroidal thickness in patients with polypoidal choroidal vasculopathy (PCV). Methods: We retrospectively analyzed the medical records of 60 eyes from 60 patients with PCV treated with intravitreal aflibercept. The patients were followed for at least 6 months after the first injection. Using software, subfoveal choroidal thickness was manually measured as the distance from the hyper-reflective line of Bruch’s membrane to the chorioscleral interface on optical coherence tomography. The patients were divided into three groups based on subfoveal choroidal thickness. Visual acuity, subfoveal choroidal thickness, central macular thickness and largest pigment epithelial detachment (PED) height, polyp regression rate, and dry macula rate were evaluated to analyze the anatomical and functional outcomes. Results: Baseline mean subfoveal choroidal thickness were 178.50 ± 28.42 μm in the thin group (14 eyes, 23.3%), 287.03 ± 43.58 μm in the medium group (33 eyes, 55.0%), and 379.77 ± 17.09 μm in the thick group (13 eyes, 21.7%). Baseline age, sex, visual acuity, central macular thickness, and the largest PED height did not differ significantly among the three subgroups. Only the thin group showed significant improvement of visual acuity at 6 months (p = 0.005). Subfoveal choroidal thickness, central macular thickness, and largest PED height were significantly decreased after treatment in all subgroups and did not differ among the subgroups. Compared with the other groups, the thin subfoveal choroidal thickness group showed higher polyp regression rate at 3 months and higher dry macula rate at 6 months (p = 0.013 and p = 0.004, respectively). Conclusions: Intravitreal aflibercept injection was effective for the treatment of PCV, and thin subfoveal choroidal thickness was associated with better anatomical and functional outcomes. J Korean Ophthalmol Soc 2016;57(10):1577-1585

서남부지역 수자원의 효율적 이용방안

김현영 ( Kim Hyun-young ),서영제 ( Suh Young-jea ),최용선 ( Choi Yong-sun ),문종원 ( Moon Jong-won ) 한국농공학회 1998 한국농공학회 학술대회초록집 Vol.1998 No.-

The south-western part of Korea is situated in an unbalance of water supply and demand relating to the Keum, Mankyung, Dongjin and Youngsan River and their estuary reservoirs. For example, the Keum River estuary reservoir is discharging the larger amount of yearly runoff into the sea due to the small storage capacity, while Saemankeum estuary reservoir which is under construction, has the smaller runoff amount comparing with its storage capacity, And the downstream area of the Youngsan River, such as Youngkwang, Youngam are deficient in water due in larger demand and smaller supply. In order to solve the above unbalanced water supply and demand and also to improve the water use efficiency, the Hierarchical Operation Model for Multi-reservoir System(HOMMS) has been developed and applied to analyze the multi-reservoir operation assuming that the above reservoirs were linked each other. The result of this study shows that 2,148MCM of annual additional water requirement for agricultural and rural water demands are required in this region at 2011 of target year, and these demands can be resolved by diverting and reusing 1,913MCM of the released water from the estuary reservoirs into the sea.