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성재경,고현송,강창우,권현조,염진영,김선환 대한뇌혈관외과학회 2011 Journal of Cerebrovascular and Endovascular Neuros Vol.13 No.3
The authors report here on a rare case of aneurysm involving the distal lenticulostriate artery (LSA) in a 66-year-old man who presented with intracerebral hemorrhage (ICH) in the right basal ganglia and also intraventricular hemorrhage (IVH). Three-dimen-sional computed tomography angiography (3D-CTA) and conventional cerebral angiography showed a 4 mm, round-shaped aneur-ysm in the right distal LSA and this was combined with moyamoya-like disease. We performed proximal clipping of the aneur-ysm using a microsurgical technique and we evacuated the hematoma. After the operation, there was recurrent bleeding around the operation site and hydrocephalus gradually developed, and we implanted a ventriculo-peritoneal (V-P) shunt. The patient did well after the final shunt surgery and rehabilitation. Presently, he has no motor weakness or significant neurologic deficit, but mild cognitive dysfunction remains. When spontaneous ICH occurs in an unusual site, a thorough investigation is important to rule out a structural vascular abnormality.
성재경,양민철,문경남,김용국 한국인터넷방송통신학회 2023 한국인터넷방송통신학회 논문지 Vol.23 No.3
본 연구는 건축시 발생되는 폐기물의 자동분류를 위해 딥러닝 알고리즘을 활용해 건출 폐기물 데이터를 각각목재 폐기물, 플라스틱 폐기물, 콘크리트 폐기물로 분류하는 두 모델들을 통해서 성능 비교를 한다. 건축 폐기물의 분류를 위해 사용된 딥러닝 알고리즘은 합성곱 신경망 이미지 분류 알고리즘 VGG-16과 NLP를 기반으로 이미지를 시퀀스화 시킨ViT, Vision Transformer 모델을 사용했다. 건축 폐기물 데이터 수집을 위해 이미지 데이터를 전 세계 검색엔진에서 크롤링 하였고, 육안으로도 명확히 구분하기 어렵거나, 중복되는 등 실험에 방해되는 이미지는 전부 제외하여각 분류당 1천장씩 총 3천장의 이미지를 확보했다. 또한, 데이터 학습시에 모델의 정확도 향상에 도움을 주기 위해 데이터 확대 작업을 진행해 총 3만장의 이미지로 실험을 진행 하였다. 수집된 이미 데이터가 정형화 되어있지 않은 데이터임에도 불구하고 실험 결과는 정확도가 VGG-16는 91.5%, ViT 는 92.7%의 결과가 나타났다. 이는 실제 건축폐기물데이터 관리 작업에 실전 활용 가능성을 제시한 것으로 보인다. 본 연구를 바탕으로 추후에 객체 탐지 기법이나 의미론적 분할 기법까지 활용한다면, 하나의 이미지 안에서도 여러 세밀한 분류가 가능해 더욱 완벽한 분류가 가능할 것이다.
성재경,서정윤 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-
This experiment was carried out to analyze the effect of liquid pig manure(LPM) application on the amount of heavy metals in paddy soil(Geo-chang) in 2004 and 2005. The analysis of heavy metals in LPM during maturing period, in swine feed which is producted in Gyeong-nam provice and in paddy soil of LPM application plot, Chemical fertilizer application plot and no manure application plot was conducted with ICP(Inductively coupled plasma Emission Spectroscopy, GBC, Australia). The results are as follows. The amount of heavy metals in LPM kept constant during maturing period. and we knew that more amount of copper and zinc was added in swine feed than the requirement amount of copper & zinc in swine. Finally it could be concluded that LPM application did not effective on environmental paddy soil.
성재경,Chang-Woo Kang,권현조,고현송,Seung-Won Choi,송시헌 대한뇌혈관외과학회 2011 Journal of Cerebrovascular and Endovascular Neuros Vol.13 No.3
Objective : Delayed cerebral ischemia due to vasospasm after aneurysmal subarachnoid hemorrhage (SAH) is a leading cause of morbidity and mortality. Recent reports have confirmed that intra-arterial infusion of calcium-channel blockers, which are wide-ly used to counteract vasospasm, is effective for treating SAH with a low risk of complications. Here we report on our experi-ence with intra-arterial nicardipine angioplasty in a consecutive series of 32 patients with SAH. Methods : This retrospective re-view evaluated a series of 32 consecutive patients with symptomatic vasospasm that was treated with intra-arterial nicardipine. The patients included in the study were diagnosed with aneurysmal SAH between January 2007 and February 2011. All the pa-tients underwent microsurgical clipping or endovascular coiling. Angioplasty using intra-arterial nicardipine was performed in those patients who were refractory to medical therapy such as triple H therapy. Results : The 32 patients underwent a total of 55procedures. The total amount of nicardipine used in each angioplasty procedure did not exceed 12 mg, with a maximum dose of 3 mg for each vessel. The Glasgow Coma Scale (GCS) score improved in all patients with an average improvement of 2.4 (range :1~5). During angioplasty, there were no complications such as thromboembolic events and/or acute transitory spasm. The clinical results were evaluated using the modified Rankin Scale (mRS). Good outcomes (mRS 0~2) were determined in 19 (63.3%) of the 30 patients. The 11 patients (36.7%) with poor outcomes initially had a high Hunt and Hess grade (III or IV) or they had in-tra-operative complications (mRS: 3~6). Conclusion : Our study results support the effectiveness and safety of low-dose nicardi-pine when performing intra-arterial angioplasty for the treatment of vasospasm after aneurysmal SAH.
뇌동맥류 파열 환자의 치료에서 수술적 클립 결찰술과 혈관내 코일 색전술과의 비교 연구
성재경,고현송,권현조,최승원,김선환,송시헌 대한뇌혈관외과학회 2011 Journal of Cerebrovascular and Endovascular Neuros Vol.13 No.1
Objective : Recently the treatment of endovascular coil embolization is gradually increasing compared to the traditional method of microsurgical clipping. However, both methods carry certain risks. The aim of this study was to compare each method's morbidity and complications in patients with ruptured cerebral aneurysms. Methods : We investigated patients who underwent surgery for subarachnoid hemorrhage (SAH) due to cerebral aneurysm rupture between January 2007 to December 2009 in our hospital. Patients' medical records and radiologic images were referenced and initial grade, location and size of aneurysm, treatment method, complications, prognosis, hospital stay and the cost were retrospectively investigated. We divided the patients into two groups according to surgical methods: clipping group and coiling group. Treatment results were evaluated using Modified Rankin Scale (MRS). Results : Total 187 aneurysms were treated in 149 patients. Sixty-five and 84 patients were classified as clipping group and coiling group, respectively. The ratio of patients with good outcome in clipping vs. coiling was 83.6% vs. 80.8%. The incidence of vasospasm was significantly lower in the coiling group compared to the clipping group. The length of hospitalization was shorter in the coiling group. The cost and operation time was also less in the coiling group. However, higher numbers of remnant sac and coil compaction were observed in the coiling group. Conclusion :Endovascular coil embolization for ruptured cerebral aneurysms had fewer vasospasms and complications. Also, it reduced the hospital stay, operation time, and cost compared with the clipping group. So, in addition to traditional microsurgical neck clipping, we think that endovascular coiling is a good alternative method to treat ruptured aneurysms.