• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2003년도 ISIS 2003
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• pp.372-375
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• 2003

The incidence of blindness resulting from diabetic retinopathy has significantly increased despite the intervention of insulin to control diabetes mellitus. Early signs are microaneurysms, exudates, intraretinal hemorrhages, cotton wool patches, microvascular abnormalities, and venous beading. Advanced stages include neovascularization, fibrous formations, preretinal and vitreous microhemorrhages, and retinal detachment. Microaneurysm count is important because it is an indicator of retinopathy progression. The purpose of this paper is to apply data mining to detect diabetic retinopathy patterns in routine fundus fluorescein angiography. Early symptoms are of principal interest and therefore the emphasis is on detecting microaneurysms rather than vessel tortuosity. The analysis does not involve image-recognition algorithms. Instead, mathematical filtering isolates microaneurysms, microhemorrhages, and exudates as objects of disconnected sets. A neural network is trained on their distribution to return fractal dimension. Hausdorff and box counting dimensions grade progression of the disease. The field is acquired on fluorescein angiography with resolution superior to color ophthalmoscopy, or on patterns produced by physical or mathematical simulations that model viscous fingering of water with additives percolated through porous media. A mathematical filter and neural network perform the screening process thereby eliminating the time consuming operation of determining fractal set dimension in every case.

• 한국임상수의학회지
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• 제25권6호
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• pp.488-493
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• 2008

This study compared the effect of injectable combinations of anesthetics on each of the fluorescein angiographic phases in order to determine the most useful anesthetic combination for the procedure. Acepromazineketamine (AK), xylazine-ketamine (XK), diazepam-ketamine (DK) and zolazepam-tiletamine (ZT) group were administered randomly to 8 dogs with a two-week interval between different combination doses. The vital signs including the heart rate and arterial pressure were measured before anesthesia and every five minutes during anesthesia. Serial angiographic images were obtained after injecting a sodium fluorescein dye (25 mg/kg) and the onset time of arterial phase (AP), arteriovenous phase (AVP), early venous phase (EVP) and late venous phases (LVP) were recorded. The onset time of the AP, AVP and EVP were significantly slower in the AK and XK groups than in the DK and ZT groups. The total duration of the AP and AVP in the AK group was significantly longer than those in the ZT group. The heart rates were significantly higher in the DK and ZT groups. The arterial pressure was significantly higher in the AK and XK groups (p<0.05). There were significant differences in each angiographic onset time and duration depending on the changes in the heart rates and arterial pressure. The AK and XK groups showed a long angiographic duration allowing an accurate evaluation. Overall, it is believed that AK and XK are more useful for performing fluorescein retinal angiography than DK and ZT.

• 대한임상검사과학회지
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• 제53권3호
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• pp.266-276
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• 2021

안저 출혈은 망막 조직과 혈관의 이상을 의미한다. 따라서 안과 의사는 안저의 출혈성 변화가 발생하면 이에 따른 치료 계획을 수립하기 위해 치료 전과 치료 중간, 치료 이후 등 병변의 진행상황을 파악하기 위해 여러 가지 안과 검사의 출혈 성 정도의 평가를 위해 오더를 지시한다. 현재 가장 유용하고 보편적인 안저검사에는 빛간섭단층촬영(OCT), 안저촬영(FP), 형광안저혈관조영술(FAG) 등이 있다. 중증 안저 출혈에 대한 치료 계획을 수립하기 위한 기존의 형광안저혈관조영술 검사에는 한계가 있다. 저자들은 광각형광혈관조영술을 이용하여 동공주위촬영과 5-quadrant 방법을 수행할 것을 제안한다. 이 방법을 사용하면 신속히 검사 부위를 결정하고 최대한 출혈의 반경을 피해 안과 의사에게 손상된 조직과 이상 혈관의 범위를 제공할 수 있다. 그런데도 불구하고 안과 의사가 안저 출혈이 매우 심각하여 광각형광혈관조영술이 무의미하다고 판단하는 경우가 있다. 이런 경우 대체검사로 안과초음파 및 망막전위도의 오더가 발생한다. 따라서 우리는 안 초음파 및 망막전위도 검사 필요성에 대해 당위성을 인정해야 하고, 정확하게 수행해야 한다.

• Parasites, Hosts and Diseases
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• 제52권5호
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• pp.537-540
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• 2014

We present a case of ocular toxocariasis treated successfully with oral albendazole in combination with steroids. A 26-year-old male visited the authors' clinic with the chief complaint of flying flies in his right eye. The fundus photograph showed a whitish epiretinal scar, and the fluorescein angiography revealed a hypofluorescein lesion of the scar and late leakage at the margin. An elevated retinal surface and posterior acoustic shadowing of the scar were observed in the optical coherence tomography, and Toxocara IgG was positive. The patient was diagnosed with toxocariasis, and the condition was treated with albendazole (400 mg twice a day) for a month and oral triamcinolone (16 mg for 2 weeks, once a day, and then 8 mg for 1 week, once a day) from day 13 of the albendazole treatment. The lesions decreased after the treatment. Based on this study, oral albendazole combined with steroids can be a simple and effective regimen for treating ocular toxocariasis.

• Journal of Yeungnam Medical Science
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• 제24권2호
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• pp.329-332
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• 2007

일광망막병증은 드물지만 일반적으로 잘 알려진 황반질환이며 이는 직접적인 태양 관찰로 인해 일어난다. 21세 남자가 단안 망원경을 이용하여 좌안으로 약 30초간 태양을 관찰하고 약 48시간 후 시력저하와 중심암점을 호소하였다. 그로부터 약 8개월 후 중심시력은 1.0에서 0.1로 저하되었고 안저검사에서 황백색의 점상 침착물이 관찰되었고 형광안저 촬영에서 망막색소상피의 결손으로 인한 창문 결손이 좌안 중심와에 나타났다. 시야검사에서는 중심 암점이 관찰되었고 시력저하는 빛에 노출된 후 1년이 지난 후에도 지속되었다.