Table 3 Lobar involvement and lesion distribution on chest CT
Normal | 84 | 20.8% |
Number of involved lobes | ||
One lobe | 40 | 12.5% |
More than one lobe | 280 | 87.5% |
Frequency of lobe involvement | ||
Upper lobes | 256 | 80% |
Middle lobe | 212 | 66.3% |
Lower lobes | 308 | 96.3% |
Pattern of involvement | ||
Upper only | 10 | 3.1% |
Middle only | 0 | 0% |
Lower only | 56 | 17.5% |
Upper + middle + lower lobes | 204 | 63.8% |
Upper + lower lobes | 42 | 13.1% |
Middle + lower lobes | 8 | 2.5% |
Distribution of the lesions | ||
Peripheral | 134 | 41.9% |
Central | 2 | 0.6% |
Peripheral and central | 184 | 57.5% |
Site of the lesions | ||
Anterior | 10 | 3.1% |
Posterior | 186 | 58.1% |
Anterior and posterior | 124 | 38.8% |