Ventilation lung scan to differentiate embolism from emphysema.
D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D011655:Pulmonary Embolism / Q000175:diagnosis*; D011656:Pulmonary Emphysema / Q000175:diagnosis*; D011868:Radioisotopes; D011877:Radionuclide Imaging; D014978:Xenon
D011868:Radioisotopes; D014978:Xenon