Velocity-Selective Magnetization-Prepared Non-Contrast-Enhanced Cerebral MR Angiography at 3T
Qin Qin 1,2 , Taehoon Shin 3 , Michael Schar 1 , Hua Guo 4 , and Ye Qiao 1
Radiology, Johns Hopkins University,
Baltimore, Maryland, United States,
Center, Kennedy Krieger Institute, Baltimore, Maryland,
Radiology, University of
Maryland, Baltimore, Maryland, United States,
for Biomedical Imaging Research, Biomedical Engineering,
Tsinghua University, Beijing, China
The new velocity-selective saturation (VSS) pulse train,
by embedding a pair of composite pulses for refocusing
in each k-segment and phase cycling applied over
consecutive k-segments, offers improved robustness to
B0/B1 inhomogeneity in the brain at 3T.
non-contrast-enhanced cerebral MR angiography was
demonstrated on healthy volunteers. Compared with TOF
MRA, VSS prepared MRA depicted more distal branches of
cerebral arteries and allowed for the whole-brain
coverage without the requirement of section positioning
orthogonal to the direction of flow.
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