Integration of Scan Time Reduction Techniques with Rearranged Elliptical Centric k-Space Acquisition for 3DTOF MRA at 3.0T
Lin C, Bernstein M, Huston III J
Mayo Clinic College of Medicine
3DTOF MRA is a useful, but slow technique, especially when multiple slabs are needed to provide adequate coverage. To achieve reduction of scan time, a combination of variable TR, not acquiring views in k-space corners, and parallel imaging is shown to be effective. These techniques are integrated with rearranged elliptical centric view order which allows simultaneous low SAR MT background suppression and flow artifact suppression. A 40% reduction in scan time with no obvious impact on image quality is obtained without parallel imaging, and a 70% reduction with minor impact is achieved with an acceleration factor of 2.