MRI acquisition
cognitive impairment
Data were acquired from each subject with a 3.0 T GE Signa HDxt scanner, including T1-weighted imaging and T2-weighted imaging. Three-dimensional high-resolution T1 weighted images were scanned by brain volume scanning sequence (BRAVO) with the following parameters: TR = 8.2 ms, TE = 3.2 ms, TI = 450 ms, FA = 12°, FOV = 256 mm × 256 mm, acquisition matrix = 256 × 256, layer thickness = 1 mm, and the number of layers = 188. Patients with cognitive impairment were examined under sedation with 10% chloral hydrate.