MOTION ARTIFACT CORRECTION IN MRI USING GENERALIZED PROJECTIONS

Patient motion during a magnetic resonance imaging (MRI) examination causes a ghost artifact in the image, which can interfere with the diagnosis. A new method is presented to suppress the translational motion artifact using post processing on a standard spin-warp image. It is shown that translational motion causes an additional phase factor in the detected signal and that this phase error can be removed using an iterative algorithm of generalized projections. The method has been tested using computer simulations and successfully removed most of the artifact. The algorithm converges even in the presence of severe noise.