ACR TI-RADS Calculator
Standardized Thyroid Imaging Reporting and Data System (TI-RADS) calculator. Calculates the risk score for thyroid nodules based on ACR guidelines and provides biopsy recommendations.
1. Composition (Select One)
2. Echogenicity (Select One)
3. Shape (Select One)
4. Margin (Select One)
5. Echogenic Foci (Select All That Apply)
About
The ACR TI-RADS (Thyroid Imaging Reporting and Data System) is a risk stratification system used by radiologists and endocrinologists to determine the malignancy risk of thyroid nodules found on ultrasound. By assigning points to five specific ultrasound features, the system classifies nodules into categories ranging from benign to highly suspicious.
This tool simplifies the scoring process. Clinicians simply select the observed characteristics in each category—Composition, Echogenicity, Shape, Margin, and Echogenic Foci. The calculator instantly computes the total point sum, assigns the corresponding TR level (TR1 through TR5), and displays the official ACR management recommendation regarding biopsy thresholds and follow-up intervals. This reduces cognitive load and ensures adherence to clinical guidelines.
Formulas
The Total Risk Score is the sum of points from five categories:
Reference Data
| TR Level | Points | Risk Category | Biopsy Threshold (Size) |
|---|---|---|---|
| TR1 | 0 points | Benign | No biopsy required |
| TR2 | 2 points | Not Suspicious | No biopsy required |
| TR3 | 3 points | Mildly Suspicious | ≥ 2.5 cm (FNA) / ≥ 1.5 cm (Follow-up) |
| TR4 | 4-6 points | Moderately Suspicious | ≥ 1.5 cm (FNA) / ≥ 1.0 cm (Follow-up) |
| TR5 | ≥ 7 points | Highly Suspicious | ≥ 1.0 cm (FNA) / ≥ 0.5 cm (Follow-up) |