Neuroradiologic applications of dynamic MR angiography at 3 T.
Four-dimensional time-resolved MR angiography (4D-MRA) using keyhole imaging techniques is a new method of performing contrastenhanced vascular imaging. Combining parallel imaging and keyhole imaging techniques, it is possible to obtain dynamic MRA scans up to 60 times faster, thereby achieving subsecond sampling of the contrast hemodynamics. Furthermore, imaging at 3 T gives higher signal, thus affording higher spatial resolution and allowing dynamic 3D MRA to approach the diagnostic performance of conventional digital subtraction angiography. This article presents the authors' clinical experience using 4D-MRA to evaluate various vascular abnormalities in the brain, spine, orbits, and neck at 3 T, demonstrates the imaging findings of this novel technique, and discusses its advantages and use in current neuroradiology practice.
Department of Radiology, University of Michigan Health System, 1500 East Medical Center Drive, Ann Arbor, MI 48109-5030, USA. hparmar@umich.edu
Hemant
H
Parmar
Marko K
MK
Ivancevic
Nancy
N
Dudek
Dheeraj
D
Gandhi
Liesbeth
L
Geerts
R
R
Hoogeveen
S K
SK
Mukherji
Thomas L
TL
Chenevert
D000328:Adult; D001164:Arteriovenous Fistula / Q000175:diagnosis; D002340:Carotid Artery Diseases / Q000175:diagnosis; D002533:Cerebral Angiography / Q000379:methods; D002561:Cerebrovascular Disorders / Q000175:diagnosis*; D003287:Contrast Media; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D002538:Intracranial Arteriovenous Malformations / Q000175:diagnosis; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008536:Meglumine / Q000031:analogs & derivatives; D008875:Middle Aged; D009942:Organometallic Compounds; D020246:Venous Thrombosis / Q000175:diagnosis
D003287:Contrast Media; D009942:Organometallic Compounds; C064572:gadobenic acid; D008536:Meglumine