PI-RADS v2.1 (Prostate MRI Assessment)
PI-RADS v2.1 prostate-MRI assessment category (1–5) from the zone-specific dominant sequence (DWI in the peripheral zone, T2W in the transition zone) and the DCE upgrade rule.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Zone of the dominant lesion
- Peripheral zone (DWI dominant)
- DWI/ADC score
- 3
- DCE
- Positive (focal early enhancement)
Result: PI-RADS 4 — high likelihood of clinically significant cancer (peripheral zone, DWI/ADC 3 upgraded by positive DCE).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Rules
- peripheral zone: DWI dominant, a DWI 3 upgraded to 4 if DCE positive. Transition zone: T2W dominant, a T2W 2 upgraded to 3 if DWI ≥ 4, a T2W 3 upgraded to 4 only if DWI = 5.
- Category
- 1 very low → 5 very high likelihood of clinically significant cancer; biopsy usually considered from ≥ 3, more strongly ≥ 4. A reporting category, not a biopsy order.
What you enter
- Zone of the dominant lesion
- DWI/ADC score (1–5)
- T2W score (1–5)
- DCE (dynamic contrast enhancement)
How this is calculated
Turkbey B, Rosenkrantz AB, Haider MA, et al. Prostate Imaging Reporting and Data System version 2.1: 2019 update of PI-RADS version 2. Eur Urol. 2019;76(3):340-351. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.