title: [Intracranial MR flow signal changes in extracranial occlusions of the internal carotid artery].
abstract: Spin-echo sequences allow an identification of the basal brain vessels because of their typical signal void. The increasing use of MRI also in clarification of cerebrovascular disease requires a good knowledge of intracranial flow alterations. We saw characteristic signal pattern in the carotid siphon in 22 prospective examined patients with occlusion of the internal carotid artery confirmed by ultrasound. The lower siphon showed a loss of flow void and a brain isointense signal. The signal in the upper siphon was identical or showed a flow void with significant calibre reduction, probably because of collateral filling. This diagnostic potential of MRI is a remarkable advantage in comparison to CT and should be routinely considered in patients with cerebrovascular disease.
authors.affiliation: Abteilung Neuroradiologie in der Neurologischen Klinik, Heidelberg.
authors.forename: M
authors.initials: M
authors.lastname: Forsting
authors.forename: J
authors.initials: J
authors.lastname: Scharf
authors.forename: R
authors.initials: R
authors.lastname: von Kummer
authors.forename: B
authors.initials: B
authors.lastname: Korsten
mesh_terms: D001157:Arterial Occlusive Diseases / Q000175:diagnosis* / Q000503:physiopathology; D002340:Carotid Artery Diseases / Q000175:diagnosis* / Q000503:physiopathology; D002560:Cerebrovascular Circulation / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging
vernacular_title: Intrakranielle MR-Flusssignalveränderungen bei extrakraniellen Verschlüssen der A. carotis interna.