Time-of-Flight Magnetic Resonance Angiography at 7 Tesla

• DOI: 10.1097/rli.0b013e31817e9b2c
• Publication Date: 2008-07-21T07:06:48Z
• Authors: Johannes T. Hever...; Eric Bourekas; Steffen Sammet; Michael V. Knopp; Petra Schmalbrock
• Keywords: Circle of Willis; Magnetic resonance angiography; Neuroradiology

Magnetic resonance angiography (MRA) is noninvasive and does not require the application of high doses contrast agents, thus used in clinical routine for evaluation cerebrovascular diseases, eg, aneurysm arteriovenous malformations. However, more subtle microvascular disease usually cannot be seen with resolution capabilities standard field strength MRA. The purpose this study was to evaluate ability 7-T time-of-flight (ToF) MRA depict arterial brain vasculature compare results data from 1.5 T 3 T.The IRB approved complied Health Insurance Portability Accountability Act. All subjects gave written informed consent. Eight healthy volunteers (age: 36 +/- 10 years; female, 5 male) were investigated using ToF at 7 T, T. Signal intensities large, primary vessels Circle Willis measured signal-to-noise ratios calculated. Visibility smaller arteries evaluated.The show that ultrahigh allows depiction large Willis. Although it provides only small increases these vessels, compared additionally demonstrates considerably first- second-order branches.Because its enhanced potential branches, may become an important tool future neuroradiology research care.