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DOI: 10.1055/s-2002-32219
© Georg Thieme Verlag Stuttgart · New York
Kontrastmittelgestützte 3D-MR-Angiographie
(CE-MRA) bei intrakraniellen Stenosen
und Aneurysmen
Contrast-enhanced intracranial 3 D MR angiography (CE-MRA) in assessing arterial stenoses and aneurysms
Publication History
Publication Date:
13 June 2002 (online)

Zusammenfassung
Ziel: Prüfung des diagnostischen Potenzials der CE-MRA bei Stenosen und Aneurysmen der intrakraniellen Arterien. Methode: Bei 13 Patienten mit intrakraniellen arteriellen Stenosen, 10 Patienten mit Aneurysmen, davon 6 nach endovasculärer Coilocclusion wurden eine CE-MRA und eine 3D TOF-MRA durchgeführt. Als Referenzen standen bei den Stenosen die Farbduplex-Sonographie, bei den Aneurysmen die DSA zur Verfügung. Ergebnisse: Filiforme Stenosen wurden in der CE-MRA und der TOF-MRA gleichermaßen identifiziert. Die CE-MRA zeigte in Regionen mit turbulentem oder stark verlangsamtem Fluss keine falsch positiven Stenosen und keinen vorgetäuschten Verschluss. Stenosen der A. cerebri media wurde in der CE-MRA nicht ausreichend abgebildet. Bei den unbehandelten Aneurysmen zeigte die TOF-MRA besser die anatomische Beziehung zum Trägergefäß. Bei inkomplett gecoilten Aneurysmen bzw. Coilkompaktierung konnte die CE-MRA besser eine Rest- oder Reperfusion des Aneurysmas nachweisen. Schlussfolgerung: Die CE-MRA hat bei begrenzter Ortsauflösung Nachteile in der Gradierung von Stenosen kleiner Gefäße, ist jedoch in Regionen mit starker Turbulenz und langsamem Fluss der TOF-MRA überlegen. Bei Coil-occludierten Aneurysmen zeigt die CE-MRA sensitiver eine Rest- oder Reperfusion.
Abstract
Purpose: The aim of this study was to evaluate the diagnostic potential of CE-MR angiography in intracranial arterial stenoses and aneurysms. Material and Methods: Thirteen patients with intracranial arterial stenoses and ten patients with aneurysms, including 6 cases with GDC coil-occluded aneurysms, were examined by both 3 D TOF-MR angiography and CE-MR angiography. In cases of stenoocclusive diseases colour-coded duplex sonography and in cases of aneurysms arterial digital subtraction angiography served as reference method. Results: Both TOF-MRA and CE-MRA could well depict filiform stenosis. In contrast to TOF-MRA, CE-MRA did not show any false positive stenosis or occlusion in regions of turbulent or slow blood flow. Stenoses of the medial cerebral artery could not be graded sufficiently by CE-MRA. In aneurysms the parent vessel was better shown by TOF-MRA. CE-MRA, however, more sensitively detected reperfusion in GDC coil-occluded aneurysms. Conclusion: Stenoses of small vessels were graded less exactly by CE-MRA than by TOF-MRA due to lower spatial resolution. CE-MRA, however, seems to be superior in regions of turbulent or slow blood flow. CE-MRA also offers advantages in follow-up examinations of coil-occluded aneurysms.
Schlüsselwörter
Intrakranielle arterielle Stenosen - Aneurysma - Endovasculäre Therapie - CE-MRA - TOF-MRA
Key words
Intracranial arterial stenosis - Aneurysm - Coil-occlusion - CE-MRA - TOF-MRA
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Dr. med. Stefan Gottschalk
Universitätsklinikum Lübeck, Institut für Radiologie, Neuroradiologie
Ratzeburger Allee 160
23538 Lübeck
Phone: + 49-451-2098
Fax: + 49-451-6190
Email: stefan.gottschalk@medinf.mu-luebeck.de