| Classification | Maximal Stenosis | Interpretation | Further Cardiac Investagation |
| CAD-RADS 0 | 0% | No CAD | None |
| CAD-RADS 1 | 1 – 24%* | Minimal non-obstructive | None |
| CAD-RADS 2 | 25 – 49% | Mild non-obstructive | None |
| CAD-RADS 3 | 50 – 69% | Moderate stenosis | Consider functional assessment |
| CAD-RADS 4 | A: 70 – 99% or
B: Left Main >50% or 3-vessel ≥ 70% |
Severe stenosis | A: Consider ICA or functional assessment
B: ICA recommended |
| CAD-RADS 5 | 100% | Total coronary occlusion | Consider ICA and/or viability assessment |
| CAD-RADS N | Non-diagnostic | Obstructive CAD cannot be excluded | Additional or alternative evaluation may be needed |
CAD: Coronary Artery Disease; ICA: Invasive Cardiac Angiography
* Includes positive remodeling with no measurable stenosis
Reference:
Cury, R. C., et al. (2016). “CAD-RADS: Coronary Artery Disease – Reporting and Data System.: An Expert Consensus Document of the Society of Cardiovascular Computed Tomography (SCCT), the American College of Radiology (ACR) and the North American Society for Cardiovascular Imaging (NASCI). Endorsed by the American College of Cardiology.” J Am Coll Radiol 13(2 Pt A): 1458 – 1466.