Mid-ventricular short-axis views of a mouse heart for different acceleration factors. Top row: representative mid-ventricular black-blood short-axis views of a healthy mouse heart (left (LV) and right ventricle (RV)) for all investigated acceleration factors R: R-values and corresponding acquisition times are given in the upper left corners. Solid white arrows indicate the papillary muscles which are accurately depicted even for an acceleration factor of R = 3.0. The open white arrow indicates a reconstruction artifact for R = 3.0 due to elevated local g-factor values. Middle row: corresponding difference images calculated between fully sampled image (R = 1.0) and images obtained from accelerated acquisitions. Bottom row: corresponding g-factor maps.