Abstract #2664

Flexible Spatial Encoding Strategies Using Rotating Multipolar Fields for Unconventional MRI Applications

Jason P. Stockmann¹,², Clarissa Zimmerman³, Matthew S. Rosen,¹², Lawrence L. Wald¹

¹Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, United States; ²Department of Physics, Harvard University, Cambridge, MA, United States; ³Electrical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States

Recently several encoding strategies have been proposed which use nonlinear spatial encoding magnetic fields (SEMs) to perform projection imaging, exploiting iterative matrix solvers for reconstruction. In the present work, we consider the case of generalized spatial encoding using a rotating multipolar field in the transverse plane, showing how a linear offset field and multiple receive coils can break the symmetry of an arbitrary nonlinear SEM, providing encoding throughout the FOV. This flexible encoding/reconstruction approach relaxes the need for a homogenous B0 field and linear gradient fields, opening the door to new, unconventional MR imaging systems.