title: Re: ventilation-perfusion studies and the diagnosis of pulmonary embolism: concise communication.
mesh_terms: D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging* / Q000473:pathology; D008722:Methods; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging* / Q000473:pathology; D011859:Radiography; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio