1. A magnetic resonance imaging (MRI) system comprising: a magnet system configured to generate a polarizing magnetic field about at least a region of interest (ROI) in a subject arranged in the MRI system; a plurality of gradient coils configured to apply a gradient field to the polarizing magnetic field; a radio frequency (RF) system configured to apply an excitation field to the subject and acquire MR image data from a ROI; a computer system programmed to: select a pulse sequence to be performed by the plurality of gradient coils and RF system to elicit a plurality of echoes from the subject as medical imaging data; compute angle locations for pairs of echoes in the plurality of echoes and magnetic field map estimates; replicate the magnetic field map estimates over a dynamic range of interest associated with the pulse sequence; identify magnetic field map estimates that provide a desired solution to a phase ambiguity function; and using the magnetic field map estimates that provide the desired solution, indicate a magnetic field map solution based on the a selected pair of echoes.