MRI data acquisition
MR
All MRI protocols were performed using a 3.0T Magnetic Resonance (MR) scanner (Ingenia CX, Philips Healthcare) with a 32‐channel head coil. Scan sequences were listed below: three‐dimensional(3D) T1 fast field echo, repeat time (TR) = 6.4 ms, echo time (TE) = 3.0 ms, field of view (FOV) = 240 × 240 × 180 mm, reconstruction voxel size = 1.1 × 1.1 × 1.1, reconstruction matrix = 400 × 400, slice thickness = 1.1 mm; 3D T2 spin echo, TR = 2500 ms, TE = 232 ms, FOV = 250 × 25 × 180 mm, reconstruction voxel size = 1.1 × 1.1 × 1.1, reconstruction matrix = 512 × 512, slice thickness = 1.1 mm; 3D fluid attenuated inversion recovery, TR = 4800 ms, TE = 244 ms, FOV = 240 × 240 × 173 mm, reconstruction voxel size = 1.1 × 1.1 × 1.1, reconstruction matrix = 384 × 384, and slice thickness = 1.2 mm. Each subject underwent the above MRI sequences.