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  • 1
    Electronic Resource
    Electronic Resource
    Serial CT and MRI of ischaemic cerebral infarcts: frequency and clinical impact of haemorrhagic transformation (2000)
    Springer
    Neuroradiology 42 (2000), S. 233-239 
    Details
    ISSN: 1432-1920
    Keywords: Key words Infarct ; cerebral ; contrast enhancement ; Infarct ; haemorrhagic transformation ; Magnetic resonance imaging ; Computed tomography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The frequency, predisposing factors and clinical consequences of haemorrhagic infarcts and damaged blood-brain barrier as shown by contrast enhancement (CE) in ischaemic cerebral infarcts are controversial. We prospectively compared the sensitivity of CT and MRI to haemorrhagic transformation (HT) and CE. We also wished to investigate the clinical significance of HT and factors possibly associated with it. We studied 36 patients with acute ischaemic infarcts in the middle cerebral artery territory during the first 2 weeks after the ictus. After CT and rating of the neurological deficit on admission, serial examinations with clinical neuromonitoring, contrast-enhanced CT and MRI were done on the same day. The occurrence and severity of HT were correlated with CE, stroke mechanism, infarct size, development of neurological deficits and antithrombotic treatment. The frequency of HT detected by MRI was 80 %. CE usually preceded HT or was seen simultaneously. MRI had a higher sensitivity than CT to HT and CE. Severity of HT was positively correlated with infarct size (P 〈 0.01). HT had no influence on patient's neurological status. Neither the type of antithrombotic treatment nor the stroke mechanism was associated with the severity of HT. No parenchymal haemorrhage occurred.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002340050878
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Diagnostik und Therapie kranialer arteriovenöser Durafisteln (1999)
    Springer
    Der Radiologe 39 (1999), S. 876-881 
    Details
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Kraniale arteriovenöse Duratisteln ; MRA ; DSA-Interventionelle Neuroradiologie ; Endovaskulärer Verschluß ; Key words Dural arterio-venous fistula ; MRI ; DSA ; Interventional Neuroradiology ; Venous occlusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary DAVF are difficult to recognize with CT- or MR-imaging. Diagnosis is often possible by arterial MRA. The type of the venous drainage as demonstrated by DSA is relevant for the clinical decision. Most often the endovascular occlusion of the affected venous segment a suitable therpeutical approach.
    Notes: Zusammenfassung Kraniale arteriovenöse Durafisteln (DAVF) sind in der Schnittbilddiagnostik schwierig, am besten mittels der arteriellen MRA erkennbar. Klinisch ist die Einteilung nach dem in der DSA ermittelten venösen Drainagetyp relevant. Therapeutisch kommt in erster Linie der transvenöse endovasculäre Verschluss in Betracht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001170050725
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Nachweis der akuten Subarachnoidalblutung FLAIR- und Protonendichte-gewichtete MRT-Sequenzen bei 1.5 Tesla (1999)
    Springer
    Der Radiologe 39 (1999), S. 860-865 
    Details
    ISSN: 1432-2102
    Keywords: Schlüsselwörter MRT-Diagnostik bei 1.5 Tesla ; FLAIR-Sequenz ; Akute Subarachnoidalblutung ; Key words MR imaging at 1.5 Tesla ; FLAIR sequence ; Acute subarachnoid hemorrhage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Purpose: To evaluate MR imaging at 1.5 Tesla in patients suffering from acute subarachnoid hemorrhage (SAH) using proton-density weighted (PDW) fast spin echo (FSE) and fluid attenuated inversion recovery (FLAIR) sequences. Methods: 19 patients suffering from acute SAH as diagnosed by CT were studied 6 h to 3 days after hemorrhage. 10 patients without SAH were studied as a control group. The presence of subarachnoid blood as well as possible artifacts was recorded. Results: In all 19 patients subarachnoid hemorrhage was detected on both FLAIR and PDW images (100%). On the FLAIR images, the cerebral ventricles were partially obscured by flow artifacts in 7 of 19 patients, the basal cisterns in 6 of 19 patients. In 4 of these 13 regions blood was diagnosed on both PDW and CT images, while in the other 9 regions both PDW and CT were unremarkable. Conclusion: The sensitivity of MRI at 1.5 Tesla in the diagnosis of subarachnoid hemorrhage is comparable to CT. The combination of FLAIR and PDW FSE sequences helps to avoid false-positive results caused by flow artifacts.
    Notes: Zusammenfassung Fragestellung: Evaluierung der Diagnostik akuter Subarachnoidalblutungen (SAB) bei 1.5 Tesla unter Verwendung einer Fluid Attenuated Inversion Recovery (FLAIR) Sequenz sowie einer Protonendichte-gewichteten (PDW) Turbo-Spinecho (TSE) Sequenz. Methodik: 19 Patienten mit nachgewiesender akuter SAB (CT) wurden 6 h bis 3 t nach Blutung untersucht. Als Kontrollgruppe wurden 10 Patienten ohne SAB untersucht. Neben der Diagnosestellung wurde auch das Auftreten von Artefakten im Bereich der Subarachnoidalräume registriert. Ergebnisse: Mit beiden Sequenzen gelang bei allen 19 Patienten die sichere Diagnosestellung (100%). Alle Patienten aus der Kontrollgruppe wurden als unauffällig befundet. Auf den FLAIR-Aufnahmen fanden sich fragliche Artefakte im Ventrikelsystem bei 7 der 19, in den basalen Zisternen bei 6 der 19 Patienten. Von diesen insgesamt 13 Regionen mit fraglichen Artefakten waren 9 sowohl auf PDW- wie CT-Aufnahmen unauffällig. In den übrigen 4 Regionen zeigten sowohl PDW wie CT Blut. Schlußfolgerungen: Der kernspintomographische Nachweis einer SAB ist bei 1.5 Tesla mit ähnlicher Sensitivität wie mittels CT möglich. Durch Kombination von FLAIR- mit einer PDW-TSE-Sequenz können falsch- positive Befunde durch Flußartefakte vermieden werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001170050723
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    Paper (German National Licenses)
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