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김재환(Jaehwan Kim),김재헌(Jae-Hean Kim),정일권(Il-Kwon Jeong) 한국HCI학회 2010 한국HCI학회 학술대회 Vol.2010 No.1
본 논문에서는 디지털 이미지 매팅에 대하여 근래 제안된 클로즈폼 솔류션의 개선된 방법을 제시한다. 제안된 방법은 각 군집된 영역내에서의 전체 유사정도로 정규화하는 정규화된 그래프 분할기법을 이용한다. 더불어, 최적화된 매트 결과를 얻기위해 목적함수에 대한 이차계획법을 적용하여 전역해를 보장하도록 한다. 오직 전경과 배경사이의 상이성만으로 고려한 기존의 클로즈폼 솔류션 매팅과는 달리, 본 방법은 전경과 배경의 상이성뿐만아니라 각각의 영역내 동질성을 동시에 고려한다. 인위적인 데이터 이미지와 실사이미지에 대한 수치 실험에서도 제시한 방법의 유용성을 보여준다. In this paper, we present an improved method of current closed-form solution for digital imagematting. This method adopts the normalized cut technique where the objective function is normalized with the total degree of structural similarity of each clustered region. In addition, we employ a quadratic programming on the objective function to obtain a globally optimal matting result. Unlike the current closed-form solution which takes the only dissimilarity between the fore- and background regions into account, our method considers the total dissimilarity between the fore- and the background regions as well as the degree of similarity within the two regions. Numerical experiments with artificial images and real-world images confirm the useful behavior of the proposed method.
흉곽내 병변의 진단에 절단침과 세흡인침을 이용한 경피적 침생검술의 비교
이양근(Yang Keun Rhee),곽재용(Jae Yong Kwak),송정선(Jeong Sun Song),김재헌(Jae Hean Kim),유관희(Kwan Hee You),이용철(Yong Chul Lee),한영민(Young Min Han) 대한내과학회 1996 대한내과학회지 Vol.51 No.3
Objectives: Percutaneous needle biopsy in the most reliable invasive method of obtaining the confirm diagnosis of peripheral pulmonary nodule. Needle aspiration combinde with cytologic examination is being used with increasing frequency in the diagnosis of pulmonary nodules and masses. Percutaneous needle lung biopsy was done in pulmonary or mediastinal lesions using 19 Gauge fine aspiration needle or 14 Gauge cutting needle, and the results were compared with respect to diagnostic accuracy and complications. Methods: Over a periods of recent ten years. 476 patients who had localized pulmonary lesions and underwent percutaneous needle lung aspiration and biopsy using 19 Gauge fine aspiration needle or 14 Gauge cutting needle. Results: The age distribution of the patients was from sixteen to eighty-one years old. Among 467 patients, 337 patients were male and 130 patients were female. In 244 patients, sizes of the lesions were less than 4cm, in largest diameter, and in 223 patients, sizes of the lesions were larger than 4cm, but the size of the lesion was not correlated with malignancy. Diagnosic yields of the 14 Gauge cutting needle and the 19 Gauge fine needle were 88.3% and 78.3% respectively. Success rate of benigm and malignant lesion was more higher in 14 Gauge cutting needle than 19 Gauge fine aspiration needle. Common diseases were priamry lung cancer, tuberculoma, abscess in order of frequency. The complications of procedure were mild pneumothorax in ten patients, mild hemoptysis in six patients and subcutaneous emphysema in one patient. With Cutting needle and aspiration needle, complication rate was 2.73% and 2.36%, respectively. Conclusion: Percutaenous needle lung biopsy with cutting needle under the chest computed tomogram and biplane fluoroscopy had lower complication rate and high diagnostic success rate for the intrathoracic lesions
심한 저알부민증과 혈소판감소증을 동반한 특발성 다발성근염 1 예
박상석(Sang Seuk Park),류완희(Wan Hee Yoo),문성기,김재헌(Jae Hean Kim),송현모(Hyun Mo Song),곽재용,임창열(Chang Yeol Yim) 대한내과학회 1997 대한내과학회지 Vol.52 No.1
Primary idiopathic polymyositis is a condition of presumed autoimmune etiology in which the skeletal muscle is damaged by a nonsuppurative inflammatory process dominated by lymphocytic infiltration. We recently experienced a patient with primary idiopathic Polymyositis associated with hypoalbuminemia and thrombocytopenia. About 4 months prior to admission, he was diagnosed as primary idiopathic polymyositis, and improved by treatment with prednisolone 60 mg/day. During steroid tapering, muscle weakness was recurred and accompanied by hypoalbuminemia and thrombocytopenia. Despite retreatment with prednisolone 60 mg/day, muscle weakness, hypoalbuminemia and thrombocytopenia persisted. He was then started to administer methotrexate(MTX) 15 mg/week which resulted in prompt improvement of muscle weakness, hypoalbuminemia and thrombocytopenia. These findnigs suggest that primary idiopathic polymyositis is one of the cause of hypoalbuminemia and thrombocytopenia, and that the hypoalbuminemia and thrombocytopenia can be improved promptly by methotrexate treatment.
곽재용,김재헌,이수택,김대곤,안득수 의과학연구소 1995 全北醫大論文集 Vol.19 No.1
Recently, there has been an increase in annual per capita consumption of alcohol beverages and the incidennce of alcoholic liver disease is steadily and significantly increasing. Two hundred six patienst had been diagnosed as typical alcoholic liver disease at Chonbuk National University Hospital from August 1991 to July 1994 were studied. the purpose of this study is to delineate clinical features of liver diseases seen in Chonbuk area alcoholics and evaluate each form of liver disease. The results are the same as follows : 1) The incidence of alcoholic cirrhosis is dependent on daily alcohol intake and duration of alcohol intake. 2) The two hundred-six cases were composed with 13 cases fatty liver, 39 cases alcoholic hepatitis and 154 cases alcoholic cirrhosis. 3) The value of γ-GTP and AST were elevated in alsmost cases and AST/ALT ratio was increased in many patienst(64%) 4) The incidence of alcoholic liver disease was relatively higher in farmers, low socioeconomic status, low educational status, rural area than others.
편평 상피세포 폐암을 동반한 Dyskinetic Cilia 증후군 1예
송항용,김재헌,임석태,이병현,이영승,이용철,이양근 의과학연구소 1995 全北醫大論文集 Vol.19 No.1
Dyskinetic cilia syndrome is an uncommon disorder, with an autosomal recessive mode of inheritance. Defect in mucociliary transport is due to immotile or dyskinetic beating of cilia. Electron microscopic finding of cilia of sperm tails, nasal and bronchial epithelium of patients revealed the partial or complete abscence of dynein This patient diaglosed as a dyskinetic cillia syndrome by electron microscopy of cilia of nasal mucos. He also had squamous cell carcinoma of the lung(stage I). he improved with conservative therapy. But he refused operation. We report a case of dyskinetic cilia syndrome with squamous cell carcinom of the lung.
경피적 세흡인침과 절단침을 이용한 흉곽내 병변의 진단적 가치에 대한 연구
이양근,곽재용,송정선,김재헌,유관희,이용철,박성광,백홍선,강성귀 의과학연구소 1996 全北醫大論文集 Vol.20 No.1
Percutaneous needle biopsy is most reliabel noninbasive method of obtaining the confirm diagnosis of peripheral pulmonary nodule. Needle aspiration combined with cytologic examination is being used with increasing frequency in the diagnosis of pulmonary nodules and masses. Percutaneous needle lung biopsy way done in pulmonary or mediastinal lesions using 19 Gauge fine aspiration needle or 14 Gauge cutting needle, and the results were compared with respect to diagnostic accuracy and complications. Over a periods of recent ten years,476 patients who had localized pulmonary lesions and underwent percutaneous needle lung aspiration and biopsy using 19 Gauge fine aspiration needle or 14 Gauge cutting needle. The age distribution of the patients was from sixteen to eighty-one years old. Among 467 patients, 337 patients were male and 130 patients were female. In 244 patients, the lesion were less than 4cm in largest diameter, and in 223 patients, the lesion were larger than 4cm, but the size of the lesion was not correlated with malignancy. Diagnosic yields of the 14 Gauge cutting needle and the 19 Gauge fine needle were 88.3% and 76.8% respectively. Success rate of benign and malignant lesion were more higher in 14 Gauge cutting needle than 19 Gauge fine aspiration needle. Common diseases were primary lung cancer, tuberculoma, abscess in order of frequency. The complications of procedure were mild pneumothorax in ten patients, mild hemoptysis in six patients and subcutaneous emphysema in one patients. With Cutting needle and aspiration needle, complication rate were 2.73% and 2.36%, respecitvely. Percutaneous needle lung biopsy with cutting needle under the chest computed tomogram and biplane fluroscopy had lower complication rate and high diagnostic success rate for the intrathoracic lesions.