Perforating arteries within Virchow–Robin Spaces (VRS) in the basal ganglia in a control subject. a Axial plane volume rendering constructive interference in the steady state (CISS) image. b Fusion image of axial plane volume rendering CISS and magnetic resonance arteriography (MRA). In the basal ganglia (BG), VRS were seen as round or oval structures with irregular walls (light blue) on CISS image (a). On fusion image (b), perforating arteries (red) were noted in some VRS (white small arrows); observations in a normal 62-year-old man. 3V third ventricle, ACA anterior cerebral artery, SCA superior cerebellar artery, FR frontal horn of the lateral ventricle, MCA middle cerebral artery, SF Sylvian fissure, TH thalamus, TR trigone of the lateral ventricle, scale bar 5 mm.