Rapid computerized lung volume determination from chest roentgenograms.
D003936:Diagnosis, Computer-Assisted; D006371:Helium; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis; D008176:Lung Volume Measurements / Q000379:methods*; D010993:Plethysmography, Whole Body; D013679:Technology, Radiologic
D006371:Helium