| 摘要 |
A magnetic resonance (MR) imaging system for reducing image artifacts caused by magnet vibration. The system includes a magnetic field vibration quantification (604-610) and compensation (614-620) scheme including correcting for a vibration error induced in k-space data corresponding to an MR image. The vibration error can be at least one of a spatially independent phase error (604) caused by a spatially invariant magnetic field, a kx-space displacement error (606) caused by a perturbation gradient along the readout direction, a ky-space displacement error (608) caused by a perturbation gradient along the phase-encoding direction, and a slice-selection error (610) caused by a perturbation gradient along the slice-selection direction. The vibration error is used to appropriately modify (614-620) and/or add to its corresponding magnetic field component, or its equivalent, in the pulse sequence. <IMAGE> |
