Figure 4: An axial anatomical sodium localizer (left) along with a sodium image of a healthy human calf muscle, acquired using 3 mm isotropic resolution, field of view of 18 cm, and TE/TR = 0.45/75 ms. The blurring of sodium images is due to the fast decaying sodium signal (much shorter transverse relaxation (T2)) compared to that of protons. Notice that the sodium signal is uniform in all the muscles of the healthy individual at rest.