TI-RADS Calculator

Written by Great Medico

Updated September 24, 2026 •2 min read

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Imaging and radiation calculations often combine simple arithmetic with highly specific clinical rules. TI-RADS Calculator handles the calculation implemented here and keeps management decisions separate from the number itself.

What this calculator does

TI-RADS Calculator uses Nodule composition, Nodule echogenicity, Nodule shape, Nodule margin, Echogenic foci, and Largest nodule diameter to produce the acr ti-rads tr1 used by this calculator. It only uses the fields shown in this calculator; it does not silently add tests, diagnoses, symptoms, or clinical variables that are absent from the interface. Uses standard health-calculator relationships where a stable equation exists; complex or policy-dependent tools expose assumptions/points so the result can be checked against the current clinical or public-health source.

How to use it

Enter or select Nodule composition, Nodule echogenicity, Nodule shape, Nodule margin, Echogenic foci, and Largest nodule diameter. Use measurements or feature points from the relevant imaging/radiation context rather than estimated substitutes. If an input is unknown, it is better to leave the calculation unresolved than to invent a value.

How the calculation works

The ACR TI-RADS feature points for composition, echogenicity, shape, margin, and echogenic foci are summed. Totals map to TR1 (0), TR2 (2 or less), TR3 (3), TR4 (4–6), or TR5 (7 or more); the entered largest diameter is displayed because size affects management thresholds.

Example

Using the calculator’s prefilled demonstration values, the primary output is 0 points, labeled “ACR TI-RADS TR1”; Nodule size is 1.5 cm. That sample is useful for checking the calculation path, but real interpretation should use verified measurements from the same clinical or study context.

How to interpret the result

The point total determines the TR category; the entered size then matters for whether ACR guidance suggests no action, ultrasound follow-up, or FNA. The category is a standardized imaging-risk descriptor, not a pathology result.

Limitations and notes

TI-RADS category alone does not determine biopsy or follow-up. ACR recommendations combine category with nodule size, and clinical context matters. The calculator also assumes the ultrasound features were identified correctly; it cannot interpret images or replace a radiology report.