How far Should Coil Coverage be Extended to Reach Optimum Simultaneous Multi-Slice Acceleration in Cardiac MRI?
Anpreet Ghotra1, Sam-Luca JD Hansen1, Robin Etzel1, Mirsad Mahmutovic1, Alina Scholz1, Nicolas Kutscha1, Matthäus Poniatowski1, Markus W May1, Choukri Mekkaoui2, and Boris Keil1
1Institute of Medical Physics and Radiation Protection, TH Mittelhessen University of Applied Sciences, Giessen, Germany, 2Harvard Medical School, Massachusetts General Hospital, Department of Radiology, A.A. Martinos Center for Biomedical Imaging, Boston, MA, United States
64-channel coil arrays with extended coverage provide more sufficient encoding capacity in SMS-accelerated cardiac imaging than arrays that compactly enclose the cardiac region.
Modelled and simulated circular overlapped coil arrays for highly SMS accelerated cardiac images.
Inverse g-Factor maps of a representative sagittal slice through the heart. g-factors were derived from axial SMS accelerations with multiband factors 4, 6, 8, and additionally combined with in-plane accelerations of R=2 and R=3. The heart region was covered by 60 slices of 2 mm each. 15, 10, and 8 collapsed slices were needed to reconstruct the full heart for MB=4, MB=6, and MB=8, respectively.