title: Reply: ventilation-perfusion scanning: stuck in a rut, perhaps, but the road ahead is not so clear.
authors.affiliation: University of Iowa 3863 JPP Department of Radiology 200 Hawkins Dr. Iowa City, IA 52242.
authors.forename: Michael M
authors.initials: MM
authors.lastname: Graham
mesh_terms: D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio