Field-Corrected Imaging Using Joint Estimation of Image and Field Map

1 Abstract In order to reduce acquisition time in dynamic scans, while still correcting for field inhomogeneities, an image reconstruction method is introduced that simultaneously estimates field-corrected images and their associated field maps while acquiring only part of k-space at each readout. A two-shot variable density spiral sequence is combined with a regularized nonlinear least-squares joint field map and image estimation method to yield afieldcorrected image between every pair of readouts, while acquiring only a little over half the k-space data at each readout.