When Does a Thyroid Nodule Need a Biopsy?
Whether a thyroid nodule needs a biopsy depends on its TI-RADS category and size. See the exact thresholds…
Enter the five ultrasound features and nodule size to get the ACR TI-RADS category, estimated malignancy risk, and a size-based biopsy or follow-up recommendation.
Score a thyroid nodule across five ultrasound features to get its ACR TI-RADS category, estimated malignancy risk, and a size-based biopsy or follow-up recommendation.
Yes. Enter the five ultrasound features and the nodule’s maximum diameter. The calculator combines the TI-RADS category with the size to show whether FNA biopsy, follow-up ultrasound, or no action is recommended, based on ACR TI-RADS 2017 thresholds.
Yes. Click the “Copy report” button to copy a formatted text report that includes all selected features, point totals, the TI-RADS category, malignancy risk, and the size-based recommendation. You can paste it into an email or message to your physician.
The calculator runs entirely in your browser. Nothing you enter is transmitted to any server, stored in a database, or logged. Closing the page or clicking Reset permanently discards all inputs. Your data stays on your device only.
Yes. The TI-RADS calculator is fully responsive and works on smartphones, tablets, and desktop browsers. No app download is required.
Yes. The calculator implements the ACR TI-RADS 2017 white paper by Tessler et al., which is the current and most recent version of the ACR TI-RADS system. There is no newer version as of 2026.
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