Retrospective motion correction in fetal MRI for clinical applications: existing methods, applications and integration into clinical practice.

Fetal magnetic resonance imaging is a complementary imaging method to antenatal ultrasound. It provides advanced information for detection and characterisation of fetal brain and body anomalies. Even although modern single shot sequences allow fast acquisition of 2D slices with high in-plane image quality, fetal MRI is intrinsically corrupted by motion. Fetal motion leads to loss of structural continuity and corrupted 3D volumetric information in stacks of slices. Furthermore, the arbitrary and constantly changing position of the fetus requires dynamic readjustment of acquisition planes during scanning.