title: Introduction to the special focus section: kidney.
authors.affiliation: University of Michigan Health System, 1500 E. Medical Center Drive, Ann Arbor, MI, 48109, USA. rdunnick@med.umich.edu.
authors.forename: N Reed
authors.initials: NR
authors.lastname: Dunnick
mesh_terms: D003952:Diagnostic Imaging / Q000639:trends*; D006801:Humans; D007674:Kidney Diseases / Q000000981:diagnostic imaging*