The effect of aging on lung perfusion.
D000368:Aged; D000375:Aging; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis; D008297:Male; D008863:Microspheres; D011652:Pulmonary Circulation; D011877:Radionuclide Imaging; D012709:Serum Albumin; D012907:Smoking; D013147:Spirometry; D013667:Technetium; D014692:Ventilation-Perfusion Ratio
D012709:Serum Albumin; D013667:Technetium