Respiratory synchronization that acquires image data at regular times independent of the respiratory cycle, but chooses the sequence of phase encoding data acquisition so as to minimize the respiratory motion-induced artifacts in the resulting image. For example, choosing the sequence of phase encoding such that adjacent samples in the final full data set have minimal differences in respiratory phase will minimize the spacing of ghosting artifacts in the final image.

(PMRFI) See Rotating Frame of Reference and Nutation.

(FAME) The FAME MRI technique uses a 3dimensional fast SPGR pulse sequence to acquire high resolution images. With its short scan time, FAME is useful for dynamic liver imaging with multiple phases.

(FREEZE) See Respiratory Ordered Phase Encoding.

(FESUM) See Gradient Recalled Echo Sequence and In Phase Image.