The CT “density mask” results for both lungs are summarized in Table 1, which shows mean lung density, total CT lung volume, total volume of emphy­sema, and percentage oflung with emphysema. There was good correlation between the mean lung density and each of the following: total CT lung volume, total CT volume of emphysema and [...]

We studied 85 patients, 52 males and 33 females, ranging in age from 40 to 78 years (mean age ± SD = 64 ± 8 yr). They were selected from patients tested in the Vancouver General Hospital Pulmonary Function Laboratory during investigation for suspected malignancy. Patients with tumors were included if the tumor was peripheral [...]