A method of estimating pulmonary disease from inspiration and expiration roentgenograms of the lungs:  its application to the evaluation of emphysema.
D004646:Emphysema; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008171:Lung Diseases; D011656:Pulmonary Emphysema / Q000175:diagnosis*; D011859:Radiography; D012119:Respiration / Q000502:physiology*
EMPHYSEMA, PULMONARY/diagnosis; LUNGS/radiography; RESPIRATION/physiology