Figure 1. Signal quality metrics examined in present study for T1-weighted MRI images, including SNR for white matter (WM) and gray matter (GM), and Contrast (WM/GM) to Noise Ratio (CNR) for t1 images.

Noise level was estimated using non-body background in the T1 image. Panel a: the chess group. Subject ID starts from 1 here or 0028197 in the repository. Panel b: the control group. Subject ID starts from 101 here or 0028297 in the repository.