폐첨부위 흉막의 정상 천막 소견 : CT 분석

성동욱 대한영상의학회 1996 대한영상의학회지 Vol.35 No.1

간농양의 초음파소견에 대한 고찰

성동욱 대한영상의학회 1983 대한영상의학회지 Vol.19 No.2

Although many papers concerning th eultrasonographic findings of liver abscess have been appeared, there is a few literatures for the analysis of its echogenic patterns. Twenty-nine cases of surgically proven liver abscess were studied by ultrasonography in our hospital during recent 3 years. 1. Ultrasonography permitted correct diagnosis in 26 of 29 patients with sensitivity 90%. 2. All the 7 cases of amebic abscess were single lesions and 6 cases of them were distributed in the right lobe of liver, while pyogenic abscesses showed single or multiple lesions. It was very difficult to distinguish pyogenic abscesses from amebic abscess in case of single lesion. 3. It was impossible to differentiate pyogenic abscess from amebic abscess by the echopattern of abscess wall and internal echogeneity. 4. The wall of obscess was ill-defined in the majority, and internal echogenecty of abscess was variable although weak internal echogenecity was more common. 5. The echopattern of abscess was gradually converted to echolucent or hypoechoic area with weak internal echoes in following up study. 6. Clinical findings and ultrasonic findings should be carefully analysed to secure correct diagnosis if there ia any possibility of co-existing necrotizing metastatic lesion.

종격동에 발생한 혈관지방종

성동욱 대한영상의학회 1990 대한영상의학회지 Vol.26 No.6

Angiolipoma is a rare benign soft tissue tumor, an unusual variant of lipoma, consisting of fatty and vascular components. The tumor is histologically benign and may be capsulated or locally invasive. They are located in the subcutis, usually in the lower extremity and trunk. Authors experienced a case of mediastinal angiolipoma in a 9-year-old girl. Chest roentgenogram revealed a huge soft tissue mass on left lower neck and entire left superior mediastinum. CT disclosed areas of low density mass intermixed with irregular foci of higher density. The mass extended to inferior mediastinum, and contralateral side through the retrocardiac space. The bulk of the mediastinal mass was resected but recurred over a period of three years.

이온성 조영제의 요도드 함량에 따른 견손상에 관한 실험적 연구

성동욱 대한영상의학회 1990 대한영상의학회지 Vol.26 No.5

Renal injury caused by iodinated contrast media has been widely known, but there has been few papers regarding the pathological change. A series of rat kidneys after injection of iodinated contrast media was examined to document pathologicl change. A total of 80 rats was divided into two groups : those given Urografin-60% by 5$m\ell$/kg ; those given Urografin-76% by 5$m\ell$/kg. The kidneys were removed out 1, 2, 3, 5, 7, 10, 14 and 21 days after injection of contrast media and microscopically examined. The results were as follows : 1. Pathological changes induced by ionic contrast media were deposition of proteinaceous materials in the proximal convoluted tubules, congestion of interstitial vessels, and vasa rectae, and epithelial degeneration of collecting ducts. There was no detectable pathological changes in the glomerulus, loop of Henle, and distal convoluted tubules. 2. All the pathological changes were severs, as the concentration of contrast media increase. 3. These pathologic hanges appeared 1 day after injection of contrast media and persisted at least 3 weeks without improvement. Author concludes that the renal damage induced by ionic contrast media becomes severe with increase in concentration, and pathologic changes are not influenced with time interval.

Polycarbonate/PMMA 공중합체 블렌드 제조 및 그들의 내스크레치 특성에 대한 연구

성동욱,여준석,황석호 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1

Polycarbonate(PC)는 높은 투과성과 내충격성, 내열성 등을 지닌 엔지니어링 플라스틱으로 가공성도 우수하여 다양한 용도로 널리 사용되고 있지만, 내 스크래치성과 표면경도 및 내마모성에 관하여 취약하다는 단점을 가지고 있다. 본 연구에서는 polycarbonate의 내스크레치성의 향상을 위하여 상대적으로 내스크레치성이 우수한 아크릴계 고분자와 블렌딩을 통하여 구현하고자 하였다. PC와 상용성을 증가시키기 위하여 phenylmethacrylate를 함유한 PMMA 공중합체 (MPC)를 사용하였다. PC/MPC 블렌드의 표면 특성을 비커스경도계와 스크래치 테스트를 이용하여 분석하였다. 또한 TMA, DSC를 이용한 열적특성 분석을 통하여 PC/MPC 블렌드의 변화된 물성을 분석하였다.

Poly(Methyl methacrylate-co-Cyclohexylmaleimide) 공중합체 중합 및 그들의 물리적 특성

성동욱,김오영,황석호 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0

Poly(methylmethacrylate)는 비정질 고분자로 높은 광학적 특성과 뛰어난 내후성 등 다양한 이점을 가지고 있으나, 사용 환경에 대한 온도적인 제약을 가지고 있다. 따라서 열적 특성의 향상을 지향하는 연구가 지속적으로 수행되고 있다. 본 실험에서는 poly(methyl methacrylate)의 열적특성을 향상시키기 위하여 열적 특성이 우수한 imide기를 포함하고 있는 n-cylcohexylmaleimide (CHMI)를 라디칼중합을 이용하여 poly(MMA-co-CHMI) 공중합체로써 제조하였다. 제조된 공중합체를 확인하기 위하여 NMR 분석을 실시하였고, 열적특성을 파악하기 위하여 DSC, TGA, DMTA를 이용한 열분석을 실시하였으며, 광학적 특성을 비교하기 위해서 UV-vis spectroscopy 분석을 실시하였다.

중간 기관지 후벽과 기관 분지 하부의 진단을 위한 단순 흉부촬영 측면 사진의 판독

성동욱 대한영상의학회 1996 대한영상의학회지 Vol.35 No.2

A lateral chest radiograph is frequently useful and sometimes decisive in detecting chest pathology. Certainparts, such as the posterior wall of the bronchus intermedius (PWBI) and subcarinal regions, can be evaluated onlyon lateral chest radiograph. The authors present and emphasize the findings of PWBI and subcarinal abnormalities.Abnormal PWBI, more than 3 mm thick, is seen in cases of minor degree of oblique position, pulmonary edema, inflammation, neoplasm and enlarged lymph nodes. It can also be seen in patients with subcarinal mass. Thefindings of subcarinal mass on lateral view are ill-defined increased opacity, fullness of the inferior hilarregion, doughnut sign, extra-density and thickening of the PWBI. Detection of changes in the PWBI and subcarinalregion may be the only diagnostic evidence of hilar and subcarinal disease and helps in its early detection priorto computed tomography.

자발성 기흉을 동반한 폐암

성동욱 대한영상의학회 1991 대한영상의학회지 Vol.27 No.3

Spontaneous pneumothorax is a rare manifestation of lung cancer. Eight cases of pneumothorax found in 1648 patients with lung cancer from 1979-1990 are reported. Histopathologic types of cancer were adenocarcinoma in three cases, squamous cell carcinoma in two cases, bronchioloalveolar carcinoma in two cases, and metastatic renal cell carcinoma in one case. The promary tumor mass was not found even after thoracotomy in two cases. Spontaneous pneumothorax occurred on the ipsilateral side fo the cancer. All the patients were more than 40 years old with a history of smoking 1-2 packs a day for 20 to 50 years, and had chronic lung diseases. The authors emphasize that bronchogenic carinoma may be one of the causes of spontaneous pheumothorax in appropriate clinical settings.

폐동맥 색전증의 방사선학적-조직병리학적 소견에 관한 실험적 연구

성동욱 대한영상의학회 1997 대한영상의학회지 Vol.37 No.6

Purpose:To evaluate the low attenuation of mosaic pattern in pulmonary embolism, as observed on HRCT, and to correlate the findings with the pathologic features of resected lung. Materials and Methods:Using permanent embolic materials, pulmonary embolism was induced in eight Yorkshire pigs. Pre-and post-embolic pulmonary angiography was performed and after 6 weeks, the incidence and pattern of parenchymal change in low attenuation(mosaic pattern), as seen on HRCT, was evaluated. The animals were then sacrified and contact radiography of the lung was performed. Thirty-eight segments of pathology were taken feom the area in which the presence of embolism had been suggested. Pathologic and HRCT findings were then correlated. Results:On HRCT, low attenuation was seen in 23 of 36 segments(64%) and showed variable patterns;crescent peripheral hyperlucency(61%, n=14), heterogeneous mottled hyperlucency(17%, n=4), lobular hyperlucency(13%, n=3), and homogeneous segmental hyperlucency(9%, n=2). Parenchymal low attenuation was seen on HRCT in 10 of 11 segments (91%) in which large segmenta arterial occlusion occurred, and in 3 of 16 segments (19%) in which there was small segmental arterial occlusion. Abnormal pathologic findings were pulomary congestion, dilatation of pulmonary arteries, interlobular septal thickening, and thrombus formation. Among the 38 pathologic segmental sepcimens, 29 were from the area in which HRCT findings were positive, and in which pulmonary embolism subsequently occurred. In only four of nine segments (44%) in the area in which HRCT findings were negative ws pulmonary embolism subsequently. Conclusion:HRCT findings of pulmonary embolism at six weeks after embolization showed variable patterns of low attenuation, diminished diametr of pulmonary arteries, and normal diameter of bronchi. In cases with large segmental arterial occlusion, the finding of low attenuation was more common;this may be due to reduced blood flow to the embolic area, in combination wih bronchiolar spasm. For the early diagnosis of pulmonary embolism these findings may be useful.

Cell voltage for Polymer Electrolyte Membrane Fuel Cells(PEMFC)

성동욱,배영찬 한국고분자학회 2006 한국고분자학회 학술대회 연구논문 초록집 Vol.2006 No.4