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변종훈,서동수,최영민,장현주,공기정,이정오,류병환,Byun, Jong-Hoon,Seo, Dong-Soo,Choi, Yuungmin,Chang, Hyunju,Kong, Ki-Jeong,Lee, Jung-O,Ryu, Beyong-Hwan 한국세라믹학회 2004 한국세라믹학회지 Vol.41 No.10
입자크기가 수 nm인 고농도 은 나노 졸을 이용하여 잉크젯 기법으로 은 미세라인을 형성하고자 하였다. 고분자전해질을 사용하여 합성한 $10wt\%$ 농도의 은 나노 졸의 입자크기는 10nm 이하였으며, 은 나노 졸을 이용한 미세 라인의 인쇄특성은 은 나노 졸의 접촉각에 매우 깊은 관계를 갖고 있었다. 순수한 ITO 기판에서 은 나노 졸은 높은 접촉각을 나타내었으며, dot 형상이 나타났다. 그러나 100ppm의 Polyethylenimine(PEI)을 코팅한 ITO 기판은 젖음성이 크게 개선되었으며, 잉크젯 기법을 이용하여 $60\~100{\mu}m$의 선폭을 갖는 은 나노 졸의 미세라인 형성이 가능함을 확인할 수 있었다. We have studied the fabrication of silver micro lines using the silver nano sol on ITO substrate by an ink-jet method. The average particles size of $10wt\%$ silver nano sol synthesized with polyelectrolytes was smaller than 10 nm. The pattern formation of silver nano sol on the substrate closely related with the contact angle of the silver nano sol. The dot shaped of silver nano sol on bare ITO substrate was formed due to the high contact angle of silver nano sol. When ITO substrates was treated with 100 ppm polyethylenimine for silver nano sol patterning, fine silver micro lines of $60{\sim}100{\mu}m$ width was fabricated by ink-jet method.
김서종(Seo Jong Kim),김봉석(Bong Seog Kim),박성기(Sung Ki Park),진교현(Gyo Hyun Jin),소군호(Kun Ho So),고정석(Jeong Rye Kim),이성규(Sung Kyu Lee),김정례(Jeong Rye Kim),노용호(Yong Ho Roh),변종훈(Jong Hoon Byun) 대한내과학회 2000 대한내과학회지 Vol.59 No.4
Primary adrenal lymphoma is extremely uncommon. The tumor is accidentally discovered by abdominal ultrasonography(USG), computed tomography(CT) or magnetic resonance imaging (MRI) in patients with nonspecific symptoms and diagnosed at operation or autopsy. In this case, a 60-year-old man was admitted for the evaluation of mild left frank discomfort for two months before admission. The abdominal USG was performed and showed the dense masses in both adrenal glands. The laboratory tests including blood count, chemistry and hormonal tests showed the normal levels except for the basal ACTH level of 108 pg/ml(normal range: 9∼52 pg/ml). The 123I MIBG scan was normal. The bilateral adrenalectomy was done. The tumor was diagnosed as diffuse large B-cell non-Hodgkin's lymphoma(NHL) according to the Revised European-American lymphoma(REAL) classification. He was treated with the adjuvant combination chemotherapy of CHOP(cyclophosphamide, adriamycin, vincristine and prednisolone) but expired due to sepsis after the second chemotherapy. We describe the first case of primary bilateral adrenal NHL in Korea. Primary adrenal lymphoma should be included in the differential diagnosis of suprarenal mass.(Korean J Med 59:423-427, 2000)
99mTc - phytate 간스캔을 이용한 간 경변증의 예후 평가
박성기(Sung Ki Park),변종훈(Jong Hoon Byun),양수현(Soo Hyun Yang),박봉철(Bong Chul Park),채동호(Dong Ho Che),조준구(Jun Koo Cho),송태원(Tae Won Song) 대한핵의학회 1991 핵의학 분자영상 Vol.25 No.1
N/A To evaluate the prognostic significance of 99mTc-phytate liver scintigraphy in patients with cirrhosis, we measured the grade of extrahepatic uptake (EHU) of 99mTc-phytate, from 0 (absent EHU) to 5 (irnportant EHU), according to the relative distribution of the radiotracer among liver, spleen and bone marrow. The results were as follows: 1) EHU score was correlated to the Pugh score (r=0.64) and to survival. 2) The ROC curve on an observed status of death was superior for EHU score. In conclusion, 99mTc-phytate liver scintigraphy may be a useful prognostic method in patients with liver cirrhosis.
99mTc - DISIDA 간담도 스캔상 담도폐쇄로 진단된 환자의 임상적 특성 - 초음파 검사상 정상 소견을 보인 9예를 중심으로 -
박성기(Sung Ki Park),변종훈(Jong Hoon Byun),양수현(Soo Hyun Yang),박봉철(Bong Chul Park),채동호(Dong Ho Che) 대한핵의학회 1992 핵의학 분자영상 Vol.26 No.1
N/A To evaluate the role of hepatobiliary (DISIDA) scan in the diagnosis of biliary obstruction, we studied the clinical characteristics of 9 cases with biliary obstructuon, whose hepatobiliary scans and ultrasonography were not concordant (normal ultrasonography and abnormal hepatobiliary scan). The results were as follows; 1) The main chief complaints (89%) were abdominal pain, especially in RUQ area. The levels of serum bilirubin were elevated in 67% of patients (normal∼5.9 mg/dl) and those of alkaline phosphatase were elevated in 78% of patients (normal∼724 U/L). 2) The final diagnoses were CBD stones (67%), tumor (22%) and 3 cases were associated with C. sinensis. 3) The major obstruction sites were in distal CBD (89%). From the above results we concluded that hepatobiliary scan is a useful diagnostic method of biliary obstruction, especially in distal CBD lesion and early stage, in spite of normal ultrasonography.
위장관 ; 겸자 조직검사와 내시경적 치료 후 검체 결과 사이에서 발생하는 위암의 조직학적 차이에 대한 예측인자
김지호 ( Ji Ho Kim ),김성훈 ( Sung Hoon Kim ),박원형 ( Won Hyeong Park ),장지선 ( Ji Sun Jang ),방제소 ( Jei So Bang ),양수현 ( Soo Hyun Yang ),변종훈 ( Jong Hoon Byun ),김윤정 ( Yoon Jung Kim ) 대한소화기학회 2012 대한소화기학회지 Vol.59 No.5
Background/Aims: Recently, variable gastrointestinal track tumors including early stage malignancies are treated by endoscopic procedure. However, the discrepancy of histologic diagnosis may sometimes exist between the pretreatment forceps biopsy results and those of post treatment specimen. So the prediction of malignant lesion is important in the aspect of treatment selection. In this study, we investigated the predictable factors of the histologic discrepancy through the clinical, endoscopic features of the lesion diagnosed as adenocarcinoma in the post-endoscopic treatment specimen after the adenoma was diagnosed by the endoscopic forceps biopsy. Methods: From March 2005 to April 2009, 129 gastric tumor lesions (129 patients) which were not diagnosed as malignancy and treated with endoscopic procedure were enrolled retrospectively. We compared the pretreatment endoscopic forceps biopsy results and post-treatment specimen biopsy results, then, analyzed the tumor characteristics. Results: Twenty-one cases (16.3%) were diagnosed as malignancy after endoscopic treatment. Especially, discrepancy occurred more frequently in depressed lesions than in flat or elevated lesions (41.7% vs. 13.7%, p=0.012), and in lesions diagnosed as high grade adenomas than low or moderate grade adenomas (33.3% vs. 11.1%. p=0.004). Conclusions: In cases of depressed type lesions in the pretreatment endoscopy or those diagnosed as high grade adenoma in the pretreatment forceps biopsy, we should consider combined malignant lesion. Therefore, treatment modalities ensuring accurate diagnosis and potentially curative resection, should be carefully selected and performed in cases which have these features. (Korean J Gastroenterol 2012;59:354-359)