Table 2:

Bilateral Substantia Nigra Comparison

Note.—Unless otherwise indicated, data are mean ± standard deviation. Comparison was performed between the Parkinson disease and healthy control groups by using a two-tailed Student t test for each individual Gaussian and non-Gaussian diffusion parameter. α = temporal diffusion heterogeneity index, β = spatial diffusion heterogeneity index, ADC = apparent diffusion coefficient, CTRW = continuous-time random walk, D_m = anomalous diffusion coefficient, HC = health control, MANOVA = multivariate analysis of variance, PD = Parkinson disease.

*P value indicates statistical significance.