Experimental data is to be acquired at the hospital using a 3-Tesla (or less) clinical MR system with a specially-tailored protocol that separates a particular region of interest inside the heart (see Figure for illustration). Which cubic region it will be remains to be decided, yet evidently, the acquired data needs to contain several different parts of the heart, e.g. the ventricles. Data is transported in DICOM format and sets can be either temporal or simply different slices taken at a given moment in time, if not analogous phases.