PRL and migraine disorder: Later, an international multicenter 3.0 T MRI study on PRL included 22 individuals suffering from non-inflammatory neurological disorders (NIND), which involved small vessel disease and migraine, using 3D T2-FLAIR image and submillimeter isotropic 3D segmented T2*-weighted EPI to provide phase image, and also found the presence of PRL was to be absent in those with NIND (26).