Part I Radiological Signs
1 Beaded Septum Sign
2 Comet Tail Sign
3 CT Halo Sign
4 Galaxy Sign
5 Reversed Halo Sign
6 Tree-in-Bud Sign
7 Gloved Finger Sign or Toothpaste Sign
8 Lobar Atelectasis Sign
9 Air-Crescent Sign
10 Signet Ring Sign
Part II Focal Lung Diseases
11 Nodule
12 Mass
13 Consolidation
14 Decreased Opacity with Cystic Airspace
15 Decreased Opacity without Cystic Airspace
Part III Diffuse Lung Diseases
16 Interlobular Septal Thickening
17 Honeycombing
18 Small Nodules
19 Multiple Nodular or Mass(-like) Pattern
20 Ground-Glass Opacity with Reticulation
21 Ground-Glass Opacity without Reticulation
22 Consolidation
23 Decreased Opacity with Cystic Walls
24 Decreased Opacity without Cystic Walls
25 Decreased Opacity without Cystic Airspace: Airway Disease
Part IV Application of Disease Pattern and Distribution, and Radiologic Signs to the Differentiation of Various Lung Diseases
26 Pneumonia Including COVID-19
27 Drug-Related Pneumonitis
28 Interstitial Lung Disease in Connective Tissue Disease.