Intracranial Dual-Venc 4D flow MRI at 7T: Effect of low versus high spatial resolution in combination with k-t GRAPPA acceleration
Susanne Schnell1, Can Wu1, Pierre-Francois Van de Moortele2, Bharathidasan Jagadeesan3, Kâmil Uğurbil2, Michael Markl1, and Sebastian Schmitter2
1Radiology, Northwestern University, Chicago, IL, United States, 2Center for Magnetic Resonance in Research, University of Minnesota, Minneapolis, MN, United States, 3Neurosurgery Department, University of Minnesota, Minneapolis, MN, United States
Dual-venc 4D flow MRI was applied in 6
healthy volunteers at a 7T MRI scanner at two different approximately isotropic
spatial image resolutions, low resolution with (1.1mm)3 and high resolution with (0.8mm)3
voxel volumes. The aim of this study was to systematically investigate the
potential of high-resolution k-t
GRAPPA accelerated dual-venc 4D flow
MRI compared to the low-resolution scan with standard GRAPPA with respect
to improved image quality (vessel sharpness and depiction of small intracranial
vessels) and quantification of intracranial flow parameters (net flow, peak
velocity).
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