ACR TI-RADS Calculator
Use this tool to estimate a thyroid nodule's TI-RADS category based on ultrasound features and size.
What "ti rads calculadora" means
If you searched for ti rads calculadora, you're likely looking for a way to quickly classify thyroid nodules using the ACR TI-RADS framework. TI-RADS stands for Thyroid Imaging Reporting and Data System, a structured method that converts ultrasound findings into a risk category (TR1 to TR5).
The goal is simple: reduce guesswork, improve consistency, and support more accurate recommendations for follow-up imaging or biopsy (FNA).
How TI-RADS scoring works
ACR TI-RADS assigns points across five feature groups. The total score determines the final category.
| Feature Group | Common Options | Points |
|---|---|---|
| Composition | Cystic/spongiform, mixed cystic-solid, solid | 0 to 2 |
| Echogenicity | Anechoic, iso/hyperechoic, hypoechoic, very hypoechoic | 0 to 3 |
| Shape | Wider-than-tall or taller-than-wide | 0 or 3 |
| Margin | Smooth/ill-defined, lobulated/irregular, extra-thyroidal extension | 0 to 3 |
| Echogenic Foci | None/comet-tail, macrocalcifications, rim calcifications, punctate foci | 0 to 3 each selected type |
TI-RADS categories and estimated risk
- TR1 (0 points): Benign, very low risk.
- TR2 (1-2 points): Not suspicious, low risk.
- TR3 (3 points): Mildly suspicious.
- TR4 (4-6 points): Moderately suspicious.
- TR5 (7+ points): Highly suspicious.
In practical terms, the category helps determine when to observe, when to repeat ultrasound, and when to proceed to FNA.
Size-based management thresholds (ACR approach)
Why size matters
A small nodule with suspicious features may still be followed rather than biopsied immediately. TI-RADS combines appearance + size to guide action.
- TR1/TR2: No routine FNA.
- TR3: Follow-up if ≥1.5 cm, FNA if ≥2.5 cm.
- TR4: Follow-up if ≥1.0 cm, FNA if ≥1.5 cm.
- TR5: Follow-up if ≥0.5 cm, FNA if ≥1.0 cm.
How to use this calculator correctly
Step-by-step
- Enter the largest nodule dimension in centimeters.
- Select one option each for composition, echogenicity, shape, and margin.
- Select echogenic foci findings (one or more if applicable).
- Click Calculate TI-RADS.
- Review total points, category, and size-based recommendation.
Common errors to avoid
- Using rounded estimates instead of measured ultrasound values.
- Mixing descriptors from different nodules in multinodular thyroids.
- Ignoring clinical context (symptoms, history, prior pathology).
- Treating calculator output as a diagnosis instead of a risk framework.
Clinical context still matters
A calculator improves consistency but does not replace expert judgment. Endocrinologists and radiologists may adjust plans based on patient age, growth over time, compressive symptoms, family history, prior radiation exposure, and patient preference.
If you are a patient reviewing your report, use this tool as a way to understand terminology and prepare better questions for your clinician.
Quick FAQ
Is TI-RADS the same as a cancer diagnosis?
No. TI-RADS estimates risk based on imaging features. Diagnosis requires proper clinical workup and, when indicated, pathology.
Can one nodule have multiple echogenic foci types?
Yes. In ACR TI-RADS scoring, suspicious foci types can be additive, which is why this calculator allows multiple selections.
Should every TR5 nodule be biopsied immediately?
Not always. Size thresholds and clinical context still apply. Management should follow physician guidance and local protocol.
Medical disclaimer: This page is for education and planning discussions with healthcare professionals. It is not medical advice and does not replace diagnostic evaluation.