A Time-Efficient Sub-Sampling Strategy to Homogenise Resolution in PatLoc Imaging

Hans Weber¹, Daniel Gallichan¹, Gerrit Schultz¹, Jrgen Hennig¹, Maxim Zaitsev¹

Varying spatial resolution is one of the characteristic properties of MR imaging when using nonlinear gradient fields for spatial encoding, as realised by PatLoc. In the particular configuration of two orthogonal quadrupolar encoding fields, voxel size is inversely proportional to the distance to the FOV centre. In this work we present an iterative reconstruction method for sub-sampled PatLoc data that improves the local resolution at the centre and leads to shorter scan times for equivalent central resolution recovery. The method is demonstrated on simulated and experimentally acquired data.