MRI FLOW ARTIFACT & GIT MOTION ARTIFACT REDUCTION

Flow Artefact Reduction



Gradient Motion Nulling
  • GMR, Flowcomp
  • Extends minimum Te degrades T1 contrast and slices/TR
  • Minimal value on T2 images only
Spatial Saturation
  • Removes Flow related Enhancement
  • Time penalty depends on sequence design
  • May be 5 msec x slabs or 5 msec x slabs x slices / n (n = 1-3)
  • Use whenever possible especially in GRE sequences
  • Superior sat slab more useful than inferior


Gut Motion Artefact reduction

Reduce gut motility
  • Fast totally for 6 hours prior to exam (cheap & effective
  • Buscopan or Glucagon (expensive & side effects)
  • 1 comment:

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