Lung-RADS

Lung CT Screening Reporting and Data System^[1]

0. Incomplete Incomplete exam Additional LDCT or comparisons
1. Negative No nodules/specific calcification No nodules and definitely benign nodules Annual LDCT
2. Benign appearance or behavior(Very low likelihood of becoming clinically active cancer due to size or lack of growth (stable > 3 mo))->Annual LDCT
- Solid < 6 mm, new 4 mm
- Part solid < 6 mm
- Non solid < 20 mm OR ≥ 20 mm unchanged or slow growing
3. Probably benign(Low likelihood of becoming clinically active cancer suggesting short term follow-up)->6 month LDCT
- Solid 6–8 mm at baseline OR new 4–6 mm
- Part solid ≥ 6 mm with solid < 6 mm OR new < 6 mm total
- Nonsolid ≥ 20 mm
4A. Suspicious (Additional diagnostic testing and/or tissue sampling is advised)->Tissue sampling OR 3 month LDCT, PET/CT when ≥ 8 mm solid
- Solid 8–15 mm at baseline OR growing < 8 mm OR new 6–8 mm
- Part solid ≥ 6 mm with solid 6–8 mm OR new growing < 4 mm total
4B. Suspicious -> Tissue sampling OR chest CT, PET/CT
- Solid ≥ 15 mm at baseline OR new or growing > 8 mm
- Part solid with solid ≥ 8 mm OR new or growing ≥ 4 mm solid