Fig. 2From: Studying Alzheimer disease, Parkinson disease, and amyotrophic lateral sclerosis with 7-T magnetic resonanceEx vivo and in vivo MR imaging of the SN. The oval-shaped hyperintense formation indicated by arrows corresponds to nigrosome 1 (N1). a Proton density axial image of an ex-vivo sample. b Gradient echo imaging at high resolution allows to define the N1 formation with typical “swallow tail appearance” in healthy subjects in vivoBack to article page