title: "Classic papers" in this online issue of Acta Radiologica.
authors.affiliation: Editor in Chief, Department of Radiology Oslo, Norway.
authors.forename: Arnulf
authors.initials: A
authors.lastname: Skjennald
mesh_terms: D006283:Health Physics / Q000266:history*; D049674:History, 21st Century; D006801:Humans; D010781:Photography / Q000266:history*; D010783:Photometry / Q000266:history*; D011835:Radiation Protection / Q000266:history*; D011859:Radiography / Q000266:history*; D011874:Radiometry / Q000266:history*; D013548:Sweden; D055815:Young Adult