Predistorted B1 Shimming: A New Concept Based on Mutual Enhancement between Static B1 Shim & 1D Spoke RF Pulse Design. Application for Cardiac Imaging at 7 Tesla.

Keywords

acceptable achieve achieving acknowledgments advantage aiming allows amplitude anterior applied apply around array arrays axial axis blue channel channels chest coefficient coil collected complex computed concept console consoles constant contrast cosine cost decreases define defined design designed deviation distorted dorsal efficiency efficient either elements enhancement evaluation excitation fast feasibility field fitting fixed flat flattening foundation free function general generated generating green hardly hardware healthy heart homogeneity homogeneous ideally identical improves increasing inhomogeneous initial instead lance locally magnitude mapping marked maximizing merge minimizing multiplied must mutual nonlinear optimization optimizes pattern pixel placed plaid position power predefined preserving principle procedure profile profiles projection projections propose proposed prostate pulse pulses reproducible requiring retrofitted satisfactory scalar seemed setting shaped shim shimming significantly simulation simulations solution solutions space spatial spatially spoke spokes static step suitable sung surface symmetrically taking target targets tends transceiver transmit turn typical unconstrained uniform variation variations varies vectors ventral view volunteer yield