two different techniques are utilized : aerosol with 198au particles ( size 0.5-15 micron ) and different gaz mixtures ( air ; o2 20 % + he 80+ ; o2 60 % + n2 40 % ; o2 60 % + he 40 % ) with 133xe and registration of the regional distribution along a wash-in ( upper , middle and basal ) of every lung ( gamma camer , computer , polaroid photographs , scans ) , performed in three groups of subjects ( normal : 5 , bronchogenic carcinoma : 11 and chronic bronchitis : 5 ) .
C0024109
lung
C0008677
chronic bronchitis