Table 1. Updates to version 1.1 of Lung-RADS.

Categories	Additions	Revisions
0	NA	NA
1	NA	NA
2	Perifissural nodule(s) <10 mm	Nonsolid nodules <30 mm OR ≥30 mm in unchanged/slowly growing nodule (<1.5 mm)
3	NA	Nonsolid nodule ≥30 mm at baseline or new
4A	NA	4A now a separate category from 4B/4X, described as “suspicious” “Tissue sampling” no longer within the 4A category descriptor
4B/4X	May pursue 1 month low dose CT for new large nodules to address infectious or inflammatory lesions
S	NA	NA
C		Category removed
---	Volumetric measurements	NA

NA, not applicable.