In-room imaging and MR planning

The Pitfalls of EPI: Distortion

fieldmap

• Geometric

displacements along EPI phase encode direction

• Caused by field inhomogeneities

T1w + contrast

DW-EPI b800

(susceptibility artefacts)

• Can be partly corrected as a post processing step

fieldmap

Tim Schakel & Astrid van Lier