title: Brain parenchyma sonography discriminates Parkinson's disease and atypical parkinsonian syndromes.
mesh_terms: D003937:Diagnosis, Differential; D004453:Echoencephalography; D006801:Humans; D019578:Multiple System Atrophy / Q000175:diagnosis / Q000000981:diagnostic imaging*; D010300:Parkinson Disease / Q000175:diagnosis / Q000000981:diagnostic imaging*; D018579:Patient Selection; D012680:Sensitivity and Specificity; D013494:Supranuclear Palsy, Progressive / Q000175:diagnosis / Q000000981:diagnostic imaging*; D013997:Time Factors