31P-MR: spectra acquired in the skeletal muscle and in the interventricular septum for different saturation protocols: no saturation (blue spectra), BISTRO saturation band (red spectra) and crusher coil (black spectra). Parameters of 3D CSI: TR = 1 s, TE = 2.3 ms, matrix size = 240×240×200 mm3, resolution = 16×16×8, 10 averages, TA = 28 min. Parameters of the crusher coil: Ispoil = 5 A and Tspoil = 100 μs. Inset: CSI grid overlaid on anatomical image with voxel positions in skeletal muscle (blue voxel) and in the interventricular septum (red voxel). BISTRO saturation band is illustrated as a yellow band in the inset.