Evaluation of regional pulmonary ventilation of gamma ray densigraphy.
D015502:Absorptiometry, Photon / Q000295:instrumentation; D000576:Americium; D006801:Humans; D008171:Lung Diseases / Q000175:diagnosis; D008722:Methods; D011874:Radiometry; D012039:Regional Blood Flow; D012119:Respiration; D013679:Technology, Radiologic
D000576:Americium