American College of Radiology Standard
Clinical Ultrasound Engine
Updated 2026
Clinical Ultrasound Engine
Updated 2026
Thyroid Nodule Malignancy Risk Calculator (ACR TI-RADS)
Evaluate ultrasound nodule features across 5 validated radiological categories to determine the official ACR TI-RADS point score, risk category (TR1 to TR5), and biopsy (FNA) criteria.
Select the internal structural makeup of the nodule as stated on your ultrasound report.
Echogenicity relative to adjacent thyroid tissue and strap muscles.
Is the anteroposterior diameter greater than the transverse diameter?
Border boundary between the nodule and surrounding parenchymal tissue.
Select all that apply on the ultrasound report (foci points are cumulative).
ACR TI-RADS Assessment Output
American College of Radiology Thyroid Imaging Reporting & Data System
TR1: Benign
0 Points
Category: TR1 • Benign Nodule
FNA Biopsy Recommendation
No Fine Needle Aspiration (FNA) biopsy required. Benign cystic or spongiform architecture carries ≤2% malignancy probability.
Clinical Protocol Summary:
- Estimated Malignancy Risk: ≤ 2%
- FNA Biopsy Size Threshold: Biopsy Not Recommended
- Surveillance Schedule: Routine clinical monitoring only