Figure 3. Examples of MRI-visible perivascular spaces. (A–D) Examples of MRI-visible BG-EPVS. (A) grade 1; (B) grade 2; (C) grade 3; (D) grade 4. (E–H) Examples of MRI-visible CSO-EPVS. (E) grade 1; (F) grade 2; (G) grade 3; (H) grade 4. (I) Example of no MRI-visible midbrain-EPVS. (J) Examples of MRI-visible midbrain-EPVS.