Table 3

Scan results and diagnosis of patients with clinical diagnosis discordant to scan results or unknown

CaseAgeUPDRSH&YPostscan diagnosis3-Year follow- up diagnosisPosterior putamen bindingFollow-up posterior putamen bindingPutamen-to-caudate ratioLeft-right asymmetry ratioTime between scans (months)
17961NDG PDRubral tremor−85%−94%0.310.4624
2*5191NDG PDNDG PD−18%−12%1.210.9827
3*6172NDG PDNDG PD−20%−16%1.200.9129
45341DystoniaNDG PD2%−14%1.120.9836
55351NDG PDNDG AP−39%−34%1.210.9726
62061UNKUNK (neurogenetic)−16%N/A1.140.97N/A
72881.5UNKUNK (dystonia parkinsonism syndrome)9%−24%1.181.0219
  • Putamen binding figures represent most affected side. Putamen-to-caudate ratio and asymmetry ratio represent posterior putamen results from baseline scans.

  • *Cases considered consistent with scans without evidence of dopaminergic deficit by treating specialist at follow-up.

  • AP, atypical parkinsonism; H&Y, Hoehn and Yahr; N/A, not available; NDG, neurodegenerative; PD, Parkinson’s disease; UNK, unknown; UPDRS, Unified Parkinson’s Disease Rating Scale.