title: Diagnostic usefulness of differences between the results of functional ventilation scanning and perfusion scanning of lungs.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008171:Lung Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging / Q000379:methods*; D014692:Ventilation-Perfusion Ratio