Keywords: Cerebellar dentate nucleus; Chelating agents; Chelation therapy; Contrast material; Cumulative exposure; DTPA; Deep brain structures; EDTA; GBCAs; Gadolinium accumulation; Gadolinium chelates; Gadolinium deposition disease; Gadolinium disposition; Gadolinium tissue retention; Globus pallidus; Hyperintense deep grey matter structures; Macrocyclic/linear agents; Neuroradiology; Neurotoxicology; Repeated contrast-enhanced scans.