Artifact reduction in ssfp mri using super field view reconstruction

In magnetic resonance imaging using steady state free precession (SSFP), a method of reducing banding artifacts comprising the steps:

• a) establishing a steady state at one resonant frequency, with a specific spatial banding pattern,
• b) acquiring a first subset of a full spatial frequency data set,
• c) changing to a steady state having a different resonant frequency and banding pattern,
• d) acquiring a second subset of the full spatial frequency data set,
• e) repeating steps c) and d) until a full data set is collected,
• f) estimating a spatial banding pattern for each frequency, and
• g) reconstructing an image using the estimated spatial banding patterns, and the known spatial frequency encoding of the acquired data using an inversion of the matrix equation
• Y=Em
• where Y is the vector of the acquired data, Y=[y1T, . . . , ynT]T,
• E is the encoding matrix, E=[(F1S1)T, . . . , (FnSn)T]T
• m is the object being imaged
• Si is a known distortion operator of the i th image,
• Fi is the Fourier matrix of a specific k-space trajectory.