Table 1.

Comparison of mean lumen diameters and mean homothety ratios assessed by MDCT versus those calculated using Weibels and Boyden's models

For each generation, values are number of assessable bronchi (No. of bronchi), mean lumen diameter measured on MDCT scans per subject and averaged over subjects (LD_m), mean theoretical lumen diameter calculated from trachea diameter using Weibel's equation [LD_t (W)] and Mauroy's homothety ratio [LD_t (M)], homothety ratio measured on MDCT scans (HRm) and theoretical homothety ratio calculated using Weibel's study [HR_t (0.79)] or Mauroy's study [HR_t (0.85)]. Values are given for each bronchial generation using either the Weibel's model [upper part, generation (W)] or the more dichotomic Boyden's classification [lower part, generation (B)]. P, P-value of paired t-test when comparing measured parameters with theoretical parameters.