Abstract: Motion artifacts at low field MRI system are more severe than those at high field strength MRI due to the longer scan time required to improve the signal-noise-ratio. As a result, image blurring and ghost artifacts caused by motion may degrade the quality of anatomical images and limit the detection of pathological changes. To reduce the motion artifacts, a self-navigated motion correction fast spin echo technique was implemented on our 0.35 T open permanent magnet MR imager. Clinical experiments showed that the motion artifacts were significantly decreased when this technique was applied.

Key words: MRI, motion artifacts, self-navigation fast spin-echo sequence, gridding reconstructio