Magnetic resonance imaging (MRI)
All imaging data were acquired on a 3-Tesla MRI Philips Ingenia scanner using a 15‐channel head coil. While we scanned migraineurs at all visits, we obtained scans from HC only once.First, we acquired whole-brain 3D T1-weighted structural images with the following scanning parameters: 170 slices, repetition time 8.4 ms, echo time 3.9 ms, flip angle 8°, voxel dimensions 1 × 1 × 1 mm, the field of view 240 mm, and scan time 4:35 min.Second, we acquired arterial spin-labelling (ASL) perfusion sequences with a pseudo-continuous ASL (pCASL) sequence