Abstract

Motion artifacts arise in magnetic resonance (MR) imaging when the patient moves (e.g., respiratory, cardiac, involuntary) during data acquisition. These artifacts give rise to “ghosts” in the reconstructed image, which typically manifest themselves along the phase-encoding direction. A model is presented to predict these artifacts due to source motion perpendicular to the slice-selection plane of the acquisition system. A three-dimensional (3-D) source with nonuniform spin density is presumed, and an arbitrary slice-selection profile is permitted.

© 1992 Optical Society of America