MRI • large series in multicentric studies to evaluate its sensitivity and specificity in different atypical parkinsonian disorders
• longitudinal studies to assess the course of the disease
MRS • for early detection and quantification of metabolic abnormalities DWI and diffusion tensor imaging (DTI)
• for early detection and quantification of changes of diffusivity in different brain areas MRS, DWI, and DTI: are they better than MRI in early diagnosis?
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