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)