TI-RADS Calculator

TI-RADS Management Guidelines

2017 ACR White Paper – FNA and Follow-up Recommendations

TR1 — Benign (0 points)

No FNA required.
No follow-up required.

TR2 — Not suspicious (2 points)

No FNA required.
No follow-up required.

TR3 — Mildly suspicious (3 points)

FNA if: nodule ≥ 2.5 cm
Follow-up if: nodule ≥ 1.5 cm

TR4 — Moderately suspicious (4–6 points)

FNA if: nodule ≥ 1.5 cm
Follow-up if: nodule ≥ 1.0 cm

TR5 — Highly suspicious (≥7 points)

FNA if: nodule ≥ 1.0 cm
Follow-up if: nodule ≥ 0.5 cm

Always integrate with clinical context and patient-specific factors.