Neurovascular imaging at 1.5 tesla versus 3.0 tesla.
The primary advantage of high field strength MR imaging over imaging on modern 1.5 Tesla (T) systems is increased signal-to-noise ratio, which can be used to improve image quality or shorten scan acquisition time. In the years since 3.0T scanners were first approved for clinical use, one of the areas which has benefited greatly from its introduction is neurovascular MR angiography (MRA). Early experience has shown significant improvements in resolution and image quality. Whether high field strength MRA is robust or accurate enough to replace digital subtraction angiography in the foreseeable future remains to be seen. This article discusses the current state of neurovascular MRA at 3.0T, basic physical differences between MR imaging at 1.5T and 3.0T, and their effects on MRA sequences. The literature regarding the efficacy of 3.0T MRA techniques for diagnosing specific neurovascular pathologies and carotid steno occlusive disease is reviewed.
Huang
Benjamin Y
BY
Department of Radiology, University of North Carolina School of Medicine, CB#7510, 101 Manning Drive, Chapel Hill, NC 27599, USA. bhuan@med.unc.edu
Castillo
Mauricio
M
D002533:Cerebral Angiography / Q000379:methods*; D002561:Cerebrovascular Disorders / Q000175:diagnosis*; D003287:Contrast Media; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional; D018810:Magnetic Resonance Angiography / Q000379:methods*
D003287:Contrast Media