FIG 2.

A typical MOLLI acquisition with two inversions. 4 out of 8 images are shown here. With the contour overlay (extracted from the second image), it is clear that myocardium motion between heart-beats can be severe. Image registration is particularly difficult for images acquired close to the signal null-point (e.g. the third image in this example), where the signal of blood and myocardium are completely inverted compared to other time points.