Lung-RADS v2022
Oncology, staging and radiology
Also known as: Lung-RADS · ACR Lung-RADS v2022 (lung cancer screening CT)
What it is for
Lung-RADS of the American College of Radiology assigns each low-dose CT lung cancer screening examination one category (0–4) based on the most suspicious finding; nodule size is the mean of long and short axis in mm.
Classification
| Category | Description |
|---|---|
| 0 — Incomplete | prior CT being located for comparison, part or all of the lungs not evaluable, or findings suggesting infection or inflammation. |
| 1 — Negative | no lung nodules, or nodules with benign features (complete, central, popcorn or concentric calcification, or fat). |
| 2 — Benign | benign appearance or behaviour, e.g. solid nodule <6 mm at baseline or new <4 mm; juxtapleural nodule <10 mm with benign shape; non-solid nodule <30 mm. |
| 3 — Probably benign | e.g. solid nodule ≥6 to <8 mm at baseline or new 4 to <6 mm. |
| 4A — Suspicious | e.g. solid nodule ≥8 to <15 mm at baseline, growing <8 mm or new 6 to <8 mm; segmental or more proximal airway nodule. |
| 4B — Very suspicious | e.g. solid nodule ≥15 mm at baseline or new or growing ≥8 mm; part-solid nodule with solid component ≥8 mm. |
| 4X | category 3 or 4 findings with additional features that increase suspicion for lung cancer. |
| S modifier | may be added to 0–4 for clinically significant findings unrelated to lung cancer. |
| Growth | an increase in mean diameter of >1.5 mm within 12 months. Categories 1–2 count as a negative and 3–4 as a positive screen. |
Source
Lung-RADS v2022 assessment categories
ACR · American College of Radiology, November 2022; summary article: Christensen J et al. J Am Coll Radiol 2024;21:473–488
- Edition
- ACR Lung-RADS v2022 (released November 2022; replaces v1.1 of 2019)
- Checked on
Summary of the published classification in our own words. Not a substitute for the original publication.
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