Ventilation-perfusion mismatch due to systemic arterial supply.
D002648:Child; D005260:Female; D006801:Humans; D008168:Lung / Q000002:abnormalities / Q000098:blood supply / Q000000981:diagnostic imaging*; D010477:Perfusion; D011652:Pulmonary Circulation; D011877:Radionuclide Imaging; D013667:Technetium; D014692:Ventilation-Perfusion Ratio; D014980:Xenon Radioisotopes
D014980:Xenon Radioisotopes; D013667:Technetium