Detection of unequal time constants in the lung by Xe technique.
D000328:Adult; D000367:Age Factors; D006801:Humans; D008722:Methods; D008875:Middle Aged; D012143:Respiratory Physiological Phenomena; D012907:Smoking; D013147:Spirometry; D013997:Time Factors; D014978:Xenon
D014978:Xenon