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관상 동맥 경화반 영상으로 스타틴 치료의 시작과 평가를 할 수 있을까?
박재형 한국지질동맥경화학회 2017 지질·동맥경화학회지 Vol.7 No.2
If there is coronary plaque, do we need statin therapy? Many studies have been conducted to answer this question. Accordingto global guidelines, there is a high-risk patient population who could benefit from statin therapy. According to the guidelines,patients with a history of previous cardiovascular disease are subject to statin therapy. In addition, several other studieshave shown that asymptomatic coronary plaque could cause future cardiovascular events. Therefore, statin therapy couldbe considered in patients with coronary artery plaque. These coronary plaques can be quantified through invasive intra-coronaryimaging equipment. Especially, vulnerable arteriosclerosis is the main cause of cardiovascular events. Use of statins in thepresence of coronary plaques may help reduce atheroma volume and stabilize vulnerability. In conclusion, coronary arteryimaging is very useful for the initiation and evaluation of statin therapy. (J Lipid Atheroscler 2017 December;6(2):61-65)
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박재형 대한영상의학회 1985 대한영상의학회지 Vol.21 No.2
In 31 cases of abdominal vascular lesions including aorta, inferior vena cava and portal vein, ultrasonography and angiography were done at department of radiology, Seoul National University Hospital, for recent 3 years for comparative analysis of those findings. The results are as follows: 1. There are 11 cases of abdominal aortic lesion such as atherosclerotic aneurysms and dissecting aneury는, 12 cases of inferior vena cava lesion such as membraneous obstruction and 5 cases of portal vein invasion dut to hepatoma. 2. Ultrasonography revealed enlarged lumen and extent of the lesions in all cases of aortic aneurysm and showed intraluminal thrombus more accurately than aotography. 3. Intimal flap was detected in all cases of dissecting aneurysm, however, ultrasonography could not show proximal extent and involvement of major branches. 4. In the casess of inferior vena cava obstruction ultrasonography revealed obstruction site and extent of the lesions accurately but vena cavog aphy depicted collateral circulation better. 5. In 5 cases of angiographic portal vein invasion dut to hepatoma, protal vein thrombus was detected in 4 cases by ultrasonography. And ultrasonography could not reveal collaterals, arteriovenous shunt and thread and streaks sign. In 31 cases of abdominal vascular lesions including aorta, inferior vena cava and portal vein, ultrasonography and angiography were done at department of radiology, Seoul National University Hospital, for recent 3 years for comparative analysis of those findings. The results are as follows: 1. There are 11 cases of abdominal aortic lesion such as atherosclerotic aneurysms and dissecting aneury는, 12 cases of inferior vena cava lesion such as membraneous obstruction and 5 cases of portal vein invasion dut to hepatoma. 2. Ultrasonography revealed enlarged lumen and extent of the lesions in all cases of aortic aneurysm and showed intraluminal thrombus more accurately than aotography. 3. Intimal flap was detected in all cases of dissecting aneurysm, however, ultrasonography could not show proximal extent and involvement of major branches. 4. In the casess of inferior vena cava obstruction ultrasonography revealed obstruction site and extent of the lesions accurately but vena cavog aphy depicted collateral circulation better. 5. In 5 cases of angiographic portal vein invasion dut to hepatoma, protal vein thrombus was detected in 4 cases by ultrasonography. And ultrasonography could not reveal collaterals, arteriovenous shunt and thread and streaks sign.
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열처리로 제조된 In2Se3 박막의 구조 및 광학적 특성 연구
박재형,김대영,박광훈,한명수,김효진,신재철,하준석,김광복,고항주 한국진공학회 2012 Applied Science and Convergence Technology Vol.21 No.3
We report investigation of structural and optical characteristics of In2Se3 thin films fabricated by thermal annealing process. Indium (In) is deposited on substrates by sputtering methods and In2Se3 thin films are fabricated by thermal annealing it with selenium vapor. The annealing temperature was changed from 150℃ to 400℃. We observe formation and phase changes of In2Se3 thin films with increase of annealing temperature. Conglomeration of In is observed at low annealing temperature (≤150℃). In2Se3 phases are started to form at 200℃ and γ-In2Se3 phase form at 350℃. High-quality γ-In2Se3 thin film with wurtzite structure is obtained at 400℃ of annealing temperature. Furthermore, we confirm that band gaps of In2Se3 thin films are increased according to increase of annealing temperature. Optical band gap of high-quality γ-In2Se3 is found to be 1.796eV. 열처리 공정으로 제조한 In2Se3 박막의 구조 및 광학적 물성을 조사하여 보고한다. 기판위에 스퍼터링 방법으로 인듐(In:indium)을 증착하고 셀레늄 분위기에서 열처리 온도를 변화시키며 In-Se 박막을 제조하였다. 열처리 온도가 증가함에 따라In2Se3 박막의 형성과 상의 변화를 관찰 할 수 있었다. 낮은 열처리 온도(≤150℃)에서는 In의 뭉침 현상을 관찰할 수 있었고열처리 온도가 250℃ 부터 In2Se3 박막이 형성되며 350℃에서 γ-In2Se3 상이 형성됨을 알 수 있었다. 열처리 온도가 400℃로 증가면 wurtzite 구조의 고품질 γ-In2Se3 박막을 얻을 수 있었다. 열처리 온도가 증가함에 따라 In2Se3 박막의 밴드갭이증가함을 알 수 있었고, 열처리 온도 400℃에서 제조된 γ-In2Se3 결정질 박막의 밴드갭이 1.796eV임을 알았다.
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