title: Regional lung expansion using 133Xe: theory and methods.
mesh_terms: D000368:Aged; D003201:Computers; D004947:Esophagus / Q000502:physiology; D005260:Female; D006801:Humans; D008170:Lung Compliance; D008433:Mathematics; D008954:Models, Biological; D011312:Pressure; D011868:Radioisotopes; D012129:Respiratory Function Tests; D014797:Vital Capacity; D014978:Xenon
chemical_list: D011868:Radioisotopes; D014978:Xenon