title: Ventilation perfusion imaging--again.
authors.forename: M J
authors.initials: MJ
authors.lastname: O'Doherty
authors.forename: T O
authors.initials: TO
authors.lastname: Nunan
mesh_terms: D006801:Humans; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio / Q000502:physiology*