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저널/프로시딩 상세정보

권호별목차 / 소장처보기

H : 소장처정보

T : 목차정보

대한방사선의학회지 = Journal of the Korean Radiological Soc...대한방사선의학회지 = Journal of the Korean Radiological Society 20건

  1. [국내논문]   급성 뇌경색증의 뇌동맥내 국소적 혈전용해술에 의한 치료  

    김선용 (아주대학교 의과대학 진단방사선과학교실)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 703 - 710 , 1996 , 0301-2867 ,

    초록

    Purpose : To evlauate the efficacy of direct intracranial thrombolytic therapy in patients with acute atherothrombotic and embolic stoke. Materials and Methods : Forty-one patients with cerebral thromboembolic disease, all in the area of the middle cerebral artery and including two cases of internal carotid artry occlusion, were treated with microcatheter-directed local intraarterial thrombolysis, using 180,000 to 1,000,000unit urokinase and 15 to 50mg of tissue plasminogen activator (tPA). The time elapsed before treatment ranged from260 to 470 minute (mean : 380 minutes). The effect of treatment was assessed by cerebral angiography, by CT and by the clinical outcome. Resulsts : For 25 patients (61%), complete vessel recanalization was successful, In eightand three cases, respectively, the result was partial recanalization and residual stenosis. In 21 patients (51%), both acute neurologic and functional outcomes improved significantly within 24 hours and in 92% of patients, within one month. Hemorrhagic transformations occured in five patients (12.2%), and in five others there were high density lesions around the basal ganglia and temporal lobe, which was cleared on CT within 24 hours This suggested transient extravasation of the contrast media rather than true hemorrhage. tPA showed better results than urokinase in terms of the rate of recanlization (68.7% vs 56.7%) and the occurrence of hemorrhagic infarction(6.3%vs 16.9%). Conclusions : Local intraarterial cerebral thrombolysis is thought be an effective method in the treatment of acute brain infarction, but in some patients may cause intracerebral hemorrhage in some patients.

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  2. [국내논문]   파킨슨병과 진행성 핵상마비에서의$^1H$자기공명분광법:예비 연구   피인용횟수: 1

    장기현 (신경학교실 ) , 전범석 (신경학교 ) , 송인찬 (서울대학교 의과대학 의공학교실, 자연과학대 학 미생물학과 생물물리학 ) , 김동성 (자연과학대학 미생물학 ) , 민관홍 (자연과학 대학 미생물학 ) , 한문희 (자연과학대학 미생물학 ) , 강사욱 (자연과학대학 미생물 학 ) , 민병구 (서울대학교 의과대학 의공학교 ) , 한만청 (서울대학교 의과대학 ? 사선과학교실)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 711 - 716 , 1996 , 0301-2867 ,

    초록

    Purpose : To determine whether 1H magnetic resonance spectroscopy (MRS) is useful in differentiatingidiopathic Parkinson's disease (IPD) from progressive supranuclear palsy (PSP), based on metabolite ratios.Materials and Methods : Using a 1.5 T MR Unit, single voxel 1H MRS using STEAM with a TR of 2000ms and a TE of135ms was performed in seven PD and eight PSP patients. Five age-matched volunteers(mean age, 63 years) andanother five younger healthy volunteers(mean age, 30 years) were studied as normal controls. The regions ofinterest were the putamen and pallidum, with a size of 2 X 2 X 2cm. After measuring the spectral intensities ofeach metabolite (N-acetylaspartate=NAA, choline=Cho, creatine=Cr and lactate), relative peak height ratios ofNAA/Cr, Cho/Cr and Naa/Cho, and lactate levels among four groups were compared. Results : NAA/Cho and NAA/Crratios were statistically lower in the PSP group than the IPD group (1.21 $\pm$ 0.26 versus 1.45 $\pm$ 0.20, and 1.26 $\pm$ 0.23 versus 1.38 $\pm$ 0.19, respectively : p $\pm$ 0.21 versus 1.76 $\pm$ 0.15, and 1.36 $\pm$ 0.13 versus1.79 $\pm$ 0.17, respectively : p 0.05). Cho/Cr ratios were not different among four groups. Lactate was not detectedin any patients. Conclusion : NAA/Cho and NAA/Cr ratios in the corpus striatum were significantly lower in the PSPgroup than in the age-matched control and IPD groups. These results suggest that loss of neuron cells in thecorpus striatum is more prominent in PSP than in IPD, and that NAA/Cho and NAA/Cr ratios may help in differentialdiagnosis of IPD and PSP.

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  3. [국내논문]   하나로 자가팽창 금속 스탠트를 이용한 돼지 경동맥에서의 실험적 연구   피인용횟수: 2

    서대철 (서울시립 보라매 병원 병리과)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 717 - 724 , 1996 , 0301-2867 ,

    초록

    Purpose : To evaluate the patency of the Hanaro self-expanding stainless steel stent in the common carotid artery of the pig. Materials and Methods : Sixteen stents(6mm in diameter/3.5mm in length) were inserted in one or both common carotid arteries of nine pigs. Carotid angiography was performed before and after stent insertion, and at the end of the follow-up period(which ranged from 4 to 13 weeks), to evaluate stent patency and change of stent location. Histopathologic study was carried out to assess the endothelial proliferation. Results : Of nine pigs with 16 successfully-inserted stents, follow-up angiography was obtained in seven pigs with 13 stents. The stents inserted were patent in 12 cases and occluded in one. Stenosis was noted in nine of the 12 stents. In three stents, there was angiographic evidence of recanalization such as non-filling or collateral filling of the rete. In no case was there any change of stent location. Endothelial proliferation was more severe in two of four occluded stents(mean thickness : 0.43mm) than in the other 11 stents(mean thickness : 0.08mm). Conclusion : Because the Hanaro stent was successfully inserted in porcine carotid arteries and showed a rather good patency(92%), the stent can be used in the small arteries. However, before it is used clinically, futher study and development appear to be necessary.

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  4. [국내논문]   자기공명위상영상법을 이용한 유체영상에서의 유속대별 영상특성  

    임태환
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 729 - 736 , 1996 , 0301-2867 ,

    초록

    Purpose : To prepare a data base for semi-quantitative measurement of blood flow velocity on MR phase imagingtechnique by analyzing the characteristics of flow image according to the ranges of flow velocity. Materials and Methods : We obtained MR phase images of flow with velocity ranging from 0 to 70cm/sec. A straight flow tube with2.09cm internal diameter and a flow tube with 75% stenosis were used as flow phantoms for this study. MR imagings were performed on a 0.35 T MR imaging system. Results : At a velocity of 0-3cm/sec, the MR phase signal proceeded from an equivocal phase change to a homogeneous intraluminal signal intensity. Ata flow velocity of 3.1cm/sec,first phase wrap occurred, and there were two phase wraps up to 15cm/sec of flow velocity. In this velocity range, the MR phase image revealed an isocentric circular target appearance. At a velocity range of 15-30cm/sec, three to four phase wraps occurred, and the MR phase image showed a multiple target appearance. At a velocity above30cm/sec, the MR phase image showed an irregular unstructured appearance and above 50cm/sec, there were no flow signals and only noise-like signals were observed. The flow phantom of the stenosis model demonstrated the same phase image pattern as the high velocity flow in the stenotic and post-stenotic areas. In the pre-stenotic area, acharacteristic reversed laminar flow profile was observed. Conclusion : Flow velocity can be detected semiquantitatively as velocity ranges on MR phase imaging. The results of the experiment using a stenotic model suggest that MR phase imaging can be used as a modality for investigation of flow velocity and profiles.

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  5. [국내논문]   Phantom상 내경동맥기시부 협착에 따른혈류변화:자기공명혈관촬영술, 디지털감산 혈관촬영술, 전산유체역학과의 비교  

    정태섭 (연세대학교 공과대학 기계공학과)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 737 - 744 , 1996 , 0301-2867 ,

    초록

    Purpose : The most important factor discrediting the reliability of MRAs is the overestimation of the degree of stenosis in the internal carotid artery(ICA). The purpose of this study is to evaluate the secondary hemodynamics and the cause(s) for the overestimation of the degree of variable stenotic phantoms of the carotidartery using steady-state flow on MRAs. Materials and Methods : Using acrylic materials, normal and variable stenotic phantoms of the bifurcated carotid artery were constructed (40% and 65%). Flow patterns were evaluated with axial and coronal imaging of MRAs (2D-TOF and 3D-TOF) and DSAs of phantoms constructed from an automated closed-type circulatory system filled with 10% glucose solution. These findings were then compared with those obtained from CFD. Results : 3D-TOF axial MRA of asymmetrically 40 percent stenotic phantom revealed 40 percent stenosis identical to the stenotic region of phantoms with continued poststenotic signal loss, whereas 3D-TOFzsial MRA of symmetrically 65 percent stenotic phantom showed markedly decreased signal intensity at the poststenotic segment resembling occlusion. Source image of 2D-TOF coronal MRA showed redistribution (from the internal to external carotid artery side) of the central axis of inflow depending upon the degree of stenosis of the ICA ; this redistribution can be a cause of the decreased signal at the poststenotic segment, due to a reduced volume of flow through the stenotic segment. The general hemodynamics of the variable stenotic phantoms on MRA were identical to the hemodynamics on DSA and CFD. Conclusion : Although dephasing from turbulent flow and character of maximum intensity projection (MIP) were suggested as the main cause of the decreased poststenotic signal, our study indicated that a hemodynamically redistributed central axis of inflow and reduced flow volume through stenotic channel is one of the basic factors of the decreased signal intensity at the poststenotic segment on MRA.

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  6. [국내논문]   혈관내 삽입된 나선형 금속스텐트가 혈관구조에 미치는 영향에 관한 실험적 연구   피인용횟수: 1

    임명관 (인하대학교 의과대학 방사선과학교실)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 745 - 756 , 1996 , 0301-2867 ,

    초록

    Purpose : The purpose of this study was to evaluate basic experimental data for the clinical application of a self-expandable stainless steel intravascular Hanaro spiral stent Materials and Methods : For evaluation of the physical properties of the Hanaro stent, hoop strength, radioopacity, longitudinal flexibility, and foreshortening were measured. Twelve intravascular Hanaro spiral stents were placed in the infrarenal abdominal aorta (n=6) and comon iliac artery (n=6) in six mongrel dogs. Angiography and light microscopic examination were performed after one, two and eight months of placement of the stents. Results : The stent had good radioopacity and was deployed with minimal foreshortening. Hoop strength of a 6mm-interval bend was found to be superior to that of 8mm- and10mm-bend stent. On angiography the patency rate and thrombosis rate were 100% and 0% in the abdominal aorta and50% and 50% in the common iliac artery, respectively. Minimal corrosion was seen in all stents, and they appeared to be biocompatible. The stent wires were covered with well-developed neointima which after one month had mostly fibroblast and collagen tissue; the thickness of the neointima increased gradually during a period of eight months. At the end of that period, collagen fibres in the neointima were denser and showed a more paralled configuration than at one month. Conclusion : The Hanaro stent has good physical properties and also has a high patency rate, and good biocompatibilities. The stent may therefore be reliably and safely deployed in the human vascular system.

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  7. [국내논문]   좌폐 대엽성 무기폐의 단순흉부 측면상 소견: 양측 상엽기관지간의 거리변화  

    신길현 (경희대학교 의과대학 진단방사선과학교실)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 757 - 762 , 1996 , 0301-2867 ,

    초록

    Purpose : To evaluate the distance between both upper lobe bronchi on lateral radiographs and its change in left upper or lower lobe collapse. Materials and Methods : 144 true lateral radiographs were analyzed on which both upper lobe bronchi were clearly identified. They included 116 normal cases, 11 cases of left upper lobe collapse, 13 of left lower lobe collapse, and 4 cases of left lower lobe lobectomy. Line A was drawn parallel to the vertebral end plate through the upper margin of the left upper lobe bronchus. Line B was drawn parallel to line A through the upper margin of the right upper lobe bronchus. The shortest distance between line A and line B was measured as the distance between both upper lobe bronchi. Results : In normal cases, the mean value of the distance was 2.19cm $\pm$ S.D. 0.37cm on right and 2.16cm $\pm$ S.D. 0.40cm on left lateral radiographs ; these results were not significantly different(P=0.79). In cases of collapse, the mean value of the distance was 0.43cm $\pm$ S.D.0.99cm in upper lobe collapse and 3.56cm $\pm$ S.D. 0.72cm in lower lobe collapse, results which were significantly different from those of normal cases(P

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  8. [국내논문]   기관지천식 환자와 정상대조군 간의 고해상 CT 소견의 비교  

    최교창 (순천향대학교 의과대학 내과학교실)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 763 - 768 , 1996 , 0301-2867 ,

    초록

    Purpose : The purpose of this study was to compare high-resolution CT(HRCT) findings of asthmatic and control subjects, and to evaluate the relationship between HRCT findings and clinical features in asthmatic subjects. Materials and Methods : Using HRCT, we studied 16 asthmatic and 16 control subjects. We analyzed the ratio of bronchial wall thickeness, the frequency of bronchial dilatation, the presence of emphysema, centrilobular nodule, and pulmonary infiltration in two groups. In addition, we assessed HRCT findings of asthmatic patients for correlation with clinical findings and the pulmonary function test. Results : The ratio of bronchial wall thickness of 16 asthmatic subjects (0.48 $\pm$ 0.08) and 16 control subjects(0.40 $\pm$ 0.08) was significantly different in statistical analysis (P $\pm$ 0.08) and eight such subjects without emphysema(0.49 $\pm$ 0.09) was not significantly different when statistically analysed. In asthmatic patients, HRCT findings did not correlate with clinical findings and the pulmonary function test. Conclusion : On high-resolution CT, the ratio of bronchial wall thickness and the frequency of bronchial dilatation between asthmatic and control subjects are significantly different.

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  9. [국내논문]   간세포암의 여러 경도관간동맥화학 색전술 치료 방법간에 생존율의 비교  

    심용운 (연세대학교 의과대학 진단방사선과학교실)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 769 - 776 , 1996 , 0301-2867 ,

    초록

    Purpose : To compare the survival rates of patients with hepatoma using different methods of transcatheter arterial chemoemblization(THAE). Materials and Methods : Four hundred and eighty three patients with hepatoma diagnosed by biopsy, serum alpha-fetoprotein, abdominal CT scan, abdominal ultrasonography or hepatic angiography were included, but not all had reccived surgical treatment. They were divided into two groups according to Child's classification and into subgroups according to different methods of THAE. Five-year survival rates among these groups were retrospectively compared. The patients were aged between 24 and 85(mean, 58) ; male to female ratio was 324:61 for those who received THAE (396:87 when only hepatic angiography was considered). Results : In the group with more than a single episode of chemoembolization, regardless of Child's classification, a better survival rate compared to the other groups with or without concommitant radiotherapy or without chemoembolization was noted. There was no difference in the survival rate of patients with multiple chemoembolization. Moreover, no difference in this rate was observed no matter what chemotherapeutic agents, including Adriamycin, Cis-Diaminedichloroplatinum or 1-131-Lipiodol, were used. Embolization by gelfoam in conjuction with Adriamycin resulted in no difference in survival rate regardless of requency of chemoembolization. Conclusions : An improved survival rate was seen when multiple episodes of chemoembolization were applied, but no difference was seen when there was concomitant application of either gelfoam or radiotherapy. Two different chemotherapeutic agents, Adriamycin and Cis-Diaminedichloroplatinum, were used, but there was no difference between them in their effect on survival rates.

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  10. [국내논문]   폐쇄성 담관질환의 진단에 있어서 호흡정지 없이 시행한 자기공명담관술의 의의  

    백승연 (이화여자대학교 의과대학 내과학교실)
    대한방사선의학회지 = Journal of the Korean Radiological Society v.34 no.6 ,pp. 777 - 784 , 1996 , 0301-2867 ,

    초록

    Purpose : MR cholangiography(MRC) in patients with obstructive biliary disease was evaluated in order to compare its role with tat of ERCP or PTC. Materials and Methods : Twenty consecutive patients with obstructive biliary and peribiliary diseases (Eleven biliary and peribiliary carcinomas, seven intrahepatic stone diseases and seven extrahepatic stone diseases) were included and ERCP(16 cases) or PTC(for cases) was performed in all twenty cases. Non-breath-hold, heavily T2-weighted, fast spin echo MRC was carried out and 2-D axial, coronal images and 3-D images with maximum intensity projection protocol were obtained. We regarded ERCP or PTC as the gold standard and then compared MRC with ERCP or PTC retrospectively. Results : In 11 patients with biliary and peribiliary carcinomas, the level of obstrction was depicted in nine cases(83%) on MRC and in six of seven cases(86%) on ECRP. The causes of obstruction were demonstrated in eight cases(73%) on MRC and in six of seven cases(86%) on ECRP. On MRC, seven cases(64%) revealed similar findings to ERCP of PTC. Of seven cases of EHD and seven of IHD stone diseases. EHD stones wee detected in six cases(86%) on MRC and in seven cases (100%) on ERCP, IHD Stones were detected in four cases(57%) on MRC and in five cases(71%) on ERCP. 2D-MRC was superior to 3D-MRC in the detection of stones. The extent and grade of ductal dilatation was accurately revealed in six cases(86%) on MRC and in seven cases(100%) on ERCP of EHD stones, in six cases(86%) on MRC and in three cases(43%) on ERCP of IHD stones. Six cases(86%) of EHD stones and two cases(29%) of IHD stones revealed similar findings between MRC and ERCP. Conclusion : MRC findings were similar to those of ERCP or PTC in the evaluation of malignant biliary diseases or extrahepatic stone diseases and was valuable in their diagnoses. In the evaluation of intrahepatic stone diseases, MRC demonstrated dilated peripheral IHDs with stones more denfinitely than ERCP but in the detection its accuracy was low. Further studies may therefore be needed.

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