Acquisition schemes for the mouse cardiac studies. Slice select and non-select, segmented, Look-Locker inversion recovery sequences with data acquisitions at every third cardiac cycle was used for the conventional T1-method (top). The TR was set to 50 RR intervals in this case. The SI-method (bottom) consisted of three acquisitions: Slice select and non-select, segmented, inversion recovery sequences, each with one acquisition at 10×RR and a segmented gradient echo sequence with no spin preparation and TR set to 10×RR. In both methods the acquisition block comprised a single excitation pulse followed by one line of k space.