Table 1 Summary of Lung-RADS Classification^a

1

No nodules; nodules with calcification

No nodules; nodules with calcification

2

Solid/part solid: < 6 mm

Solid/part solid: < 6 mm

GGN: < 20 mm

GGN:< 20 mm or unchanged/slowly growing

Category 3–4 nodules unchanged at ≥3 mo

3

Solid: ≥ 6 to <8 mm

Solid: New ≥4 to <6 mm

Part solid: ≥ 6 mm with solid component <6 mm

Part solid: New <6 mm

GGN: ≥ 20 mm

GGN: New ≥20 mm

4A

Solid: ≥ 8 mm to <15 mm

Solid: Growing <8 mm or new ≥6 and <8 mm

Part solid: ≥ 8 mm with solid component ≥6 and <8 mm

Part solid: ≥ 6 mm with new or growing solid component <4 mm

4B

Solid: ≥15 mm

Solid: New or growing and ≥8 mm

Part solid: Solid component ≥8 mm

Part solid: ≥ 6 mm with new or growing solid component ≥4 mm

4X

Category 3 or 4 nodules with additional features; imaging findings that increase suspicion of malignancy

Category 3 or 4 nodules with additional features; imaging findings that increase suspicion of malignancy