title: Question of the month--October.
authors.forename: A J
authors.initials: AJ
authors.lastname: Hilson
mesh_terms: D016477:Artifacts; D001921:Brain / Q000000981:diagnostic imaging; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging; D019047:Phantoms, Imaging; D011877:Radionuclide Imaging / Q000379:methods*