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  • 1
    Electronic Resource
    Electronic Resource
    MRI of Budd-Chiari syndrome (1994)
    Springer
    Abdominal imaging 19 (1994), S. 325-329 
    Details
    ISSN: 1432-0509
    Keywords: Budd-Chiari syndrome ; MR study ; Liver, MR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A retrospective study was undertaken to reassess the various magnetic resonance imaging (MRI) features of Budd-Chiari syndrome (BCS). MRI examinations of 22 patients with pathologically confirmed BCS were studied. Spin-echo (SE) T1- (TR = 300–450 ms/TE = 12–15 ms), and SE T2-weighted (TR = 1600–2000 ms/TE = 30–60/90–120 ms) MRI images were obtained in all patients. Gradient-recalled-echo (GRE) images (TR = 7–60 ms/TE = 3–19 ms, flip angle = 10–40°) were obtained in 14 patients. MRI showed thrombosis of three or two hepatic veins in 19 (86%) and 3 (14%) patients, respectively. Spontaneous intrahepatic anastomoses was depicted in five (23%) patients. Ascites appeared in 15 patients (68%). Thrombosis or external compression of the inferior vena cava (IVC) by an enlarged caudate lobe was depicted in six (27%) and five (23%) patients, respectively. Prominent azygos and hemiazygos veins were demonstrated in seven (32%) patients (six of whom had thrombosis of the IVC). MRI showed hepatomegaly in all patients and enlarged caudate lobe in 18 (82%) patients. SE T1- and SE T2-weighted MRI images revealed inhomogeneous signal intensity of hepatic parenchyma in 14 (64%) patients. SE T1- and SE T2-weighted MRI images showed homogeneous signal intensity of hepatic parenchyma in eight (36%) patients. Our results demonstrate that BCS displays various features on MRI images, and such information is important for diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00198189
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  • 2
    Electronic Resource
    Electronic Resource
    Benign solitary neurinomas of the sciatic popliteal nerves CT study (1991)
    Springer
    Neuroradiology 33 (1991), S. 186-188 
    Details
    ISSN: 1432-1920
    Keywords: CT ; Popliteal fossa, tumors ; Schwannomas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two cases of solitary benign neurinomas of the sciatic popliteal nerves are reported. Computed tomography (CT) confirmed the clinically suspected diagnosis of a tumor of nervous origin, and provided accurate preoperative location of these tumors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588267
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Spontaneous intracerebral hematomas from vascular causes (1991)
    Springer
    Neuroradiology 33 (1991), S. 291-295 
    Details
    ISSN: 1432-1920
    Keywords: CT, brain studies ; Hematoma, intracerebral ; Vascular malformations, CT ; Vascular malformations, angiography ; Statistical studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The aim of the present study was to assess the diagnostic accuracy of CT in determining the underlying causes of brain hematomas with a state-of-the art CT. For this purpose, CT and angiographic data of 149 subjects with spontaneous intracerebral hematomas (ICH) were statistically compared in a blind, retrospective study, taking angiography, supported when possible by surgical findings, as providing the correct diagnoses. 5 groups were distinguished on the basis of CT data: 103 patients with isolated deep ICH had normal angiograms; 9 patients with isolated superficial ICH and 8 with deep ICH and intraventricular hemorrhage (IVH) had arteriovenous malformations (AVMs). 4 with this combination showed no angiographic abnormalities, one had an aneurysm. 14 subjects with ICH and subarachnoid hemorrhage (SAH) had a middle cerebral or carotid artery aneurysm; and 10 with ICH, SAH and IVH had also an aneurysm, in 7 on the anterior communicating artery. Sensitivity, specificity, positive and negative predictive values were respectively: for AVMs 100, 96, 77 and 100%; and for aneurysms 96, 100, 100 and 99%. Kendall coefficient was 0.95, indicating close correlation between the two modalities. This study confirms that CT can accurately predict the likelihood, nature and location of vascular ICHs. It indicates whether angiography is necessary or not, and if so, what vascular tree ought to be explored.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00587808
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic resonance angiography (MRA) of the circle of Willis: a prospective comparison with conventional angiography in 54 subjects (1994)
    Springer
    Neuroradiology 36 (1994), S. 193-197 
    Details
    ISSN: 1432-1920
    Keywords: Circle of Willis, functional studies ; Circle of Willis, anatomy ; Cerebral angiography ; Magnetic resonance angiography ; Brain, ischaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We prospectively correlated the findings of magnetic resonance angiography (MRA) with those of transfemoral four-vessel angiography in 54 patients to investigate the direction of flow within the circle of Willis. Our primary goal was to assess the direction of flow using the size of the vessel and signal intensity, without saturation techniques. Analysis of the circle of Willis, especially the communicating arteries, was performed double-blind by two groups of two radiologists. Three types of arteries were identified: high flow or cross-cerebral circulation, patent and nonvisualised arteries. Cerebral angiography was the standard for comparison between the two methods. MRA did not reveal any arteries invisible on angiography, thus providing a specificity of 100%. The sensitivity of MRA was 89.2% for the anterior and 81.3% for the posterior communicating arteries, and 100% for the anterior, middle and posterior cerebral arteries. MRA was shown to be a useful technique for the assessment of patency of the circle of Willis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588129
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    Paper (German National Licenses)
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