Extracranial carotid MR imaging at 3T

Magnetic Resonance Imaging Clinics of North America
J K DemarcoAndrew K Nash

Abstract

Some controversy exists over the accuracy and optimal parameters for carotid CE MR angiography at 1.5T. Spatial resolution remains more important than does temporal resolution to address the key question of vessel stenosis, based upon a review of the available literature that compares CE MR angiography with DSA. Specifically, CE MR angiograms with 0.9- to 1.2-mm resolution in all three planes before interpolation have a high reported sensitivity and specificity compared with DSA. To achieve this type of spatial resolution, cover the entire course of the carotid arteries from the aortic arch through the skull base, and achieve an absence of venous signal usually requires an elliptic-centric phase encoding CE MR angiogram that lasts for 50 to 60 seconds without the use of parallel imaging techniques. This near-millimeter resolution requires an accurate timing of the gadolinium bolus arrival to maximize intra-arterial SNR and to minimize venous contamination. Parallel imaging techniques can decrease the imaging time, but at a cost of some SNR. Initial experience with eight-channel or higher neurovascular coils at 3T indicates an increase in SNR/CNR compared with 1.5T. This should allow more consistent submillimeter-resolution caro...Continue Reading

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Citations

Mar 20, 2010·Cardiovascular and Interventional Radiology·Luca SabaGiorgio Mallarini
May 3, 2012·Neuroimaging Clinics of North America·J Kevin DeMarcoJohn Huston
Aug 27, 2010·Neurología : publicación oficial de la Sociedad Española de Neurología·J C Portilla CuencaI Casado Naranjo
Apr 15, 2009·Magnetic Resonance Imaging Clinics of North America·Benjamin Y Huang, Mauricio Castillo
Dec 6, 2008·Neurologic Clinics·Vernice Bates
Dec 1, 2011·Journal of Magnetic Resonance Imaging : JMRI·Naoyuki TakeiHiroyuki Kabasawa
Jul 10, 2010·Stroke; a Journal of Cerebral Circulation·Hideki OtaJ Kevin DeMarco
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Dec 21, 2010·Expert Review of Cardiovascular Therapy·Hunter R Underhill, Chun Yuan
May 22, 2010·The Journal of Spinal Cord Medicine·Andrew L Goldberg, Sharif M Kershah

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