The use of lung scan and its value.
D000368:Aged; D000792:Angiography; D005260:Female; D006801:Humans; D008171:Lung Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000175:diagnosis; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011656:Pulmonary Emphysema / Q000175:diagnosis; D011877:Radionuclide Imaging