Fig. 3From: Studying Alzheimer disease, Parkinson disease, and amyotrophic lateral sclerosis with 7-T magnetic resonance3D multi-echo T2*-weighted images of the substantia nigra at the level of the nigrosome 1 (arrow) in a an RBD patient with a normal imaging of the substantia nigra who has not developed symptoms or signs of parkinsonism in the follow-up; b an RBD patient with abnormal findings at imaging (the nigrosome 1 was not visible), who eventually converted to PDBack to article page