Fig. 2.

TB Progression Score 5.

(a) TBI = 2. CT image demonstrated ground-glass and reticular opacities with sub-pleural and basal distribution with mild traction bronchiectasis indicating Subpleural fibrotic ILA.

(b) TBI = 3. Follow-up CT image demonstrated marked interval progression of ground-glass and reticular opacities with sub-pleural and basal distribution. Note is made of severe traction bronchiectasis associated with architectural distortion.

TBI, traction bronchiectasis/bronchiolectasis index; ILA, interstitial lung abnormality