Brain MR Contribution to the Differential Diagnosis of Parkinsonian Syndromes: An Update

<div>(a) High-resolution MRI (Philips Ingenia 3 T SWIp sequence) in a healthy subject: nigrosome 1 is evident as a linear, comma- or wedge-shaped hyperintense area surrounded by low signal intensity structures of the pars compacta of the substantia nigra, resembling a swallow tail (arrows). (b) In a patient with PD, nigrosome 1 is not visible bilaterally.</div>

Parkinson’s Disease

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Figure 1

Figure 1: Brain MR Contribution to the Differential Diagnosis of Parkinsonian Syndromes: An Update 