🔬 Prostate PI-RADS v2.1 Score
Compute the prostate PI-RADS v2.1 assessment category by zone using the dominant sequence and upgrade rules, with management. Instant, browser-side.
DCE only arbitrates the peripheral-zone DWI-3 lesion.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
When to use
Score a prostate mpMRI lesion and decide on MRI-targeted biopsy.
How it works
PZ is DWI-dominant (DWI = 3 upgrades to 4 with positive DCE); TZ is T2-dominant (T2 = 2 + DWI ≥ 4 → 3, T2 = 3 + DWI = 5 → 4). Categories 1–5.
Key points
- DCE only arbitrates the peripheral-zone DWI-3 lesion.
- PI-RADS 1–2 carry low likelihood of clinically significant cancer.
- PI-RADS 3 is equivocal — PSA density (≥ 0.15) favours biopsy.
- PI-RADS 4–5 warrant MRI-targeted biopsy.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Lesion zone | Peripheral zone PZ (DWI dominant) |
|---|---|
| DWI/ADC score | 1 |
| T2WI score | 1 |
| DCE dynamic enhancement | Positive (focal early enhancement at the suspicious lesion) |
→ScorePI-RADS 1
- Score：PI-RADS 1 (clinically significant cancer detection rate ~3%)
- Basis：PZ is DWI-dominant; DWI = 1 → PI-RADS 1
- Management：Clinically significant cancer highly unlikely: generally no biopsy; follow PSA/clinical
| Lesion zone | Transition zone TZ (T2 dominant) |
|---|---|
| DWI/ADC score | 5 |
| T2WI score | 5 |
| DCE dynamic enhancement | Negative |
→ScorePI-RADS 5
- Score：PI-RADS 5 (clinically significant cancer detection rate ~83%)
- Basis：TZ is T2-dominant; T2 = 5 → PI-RADS 5
- Management：Clinically significant cancer highly likely: MRI-targeted biopsy recommended
Frequently asked questions
- What is Prostate PI-RADS v2.1 Score?
- Compute the prostate PI-RADS v2.1 assessment category by zone using the dominant sequence and upgrade rules, with management. Instant, browser-side.
- How is Prostate PI-RADS v2.1 Score calculated? What is the core formula?
- PZ is DWI-dominant (DWI = 3 upgrades to 4 with positive DCE); TZ is T2-dominant (T2 = 2 + DWI ≥ 4 → 3, T2 = 3 + DWI = 5 → 4). Categories 1–5.
- When is Prostate PI-RADS v2.1 Score used?
- Score a prostate mpMRI lesion and decide on MRI-targeted biopsy.
- What are the key clinical points for Prostate PI-RADS v2.1 Score?
- DCE only arbitrates the peripheral-zone DWI-3 lesion. PI-RADS 1–2 carry low likelihood of clinically significant cancer. PI-RADS 3 is equivocal — PSA density (≥ 0.15) favours biopsy. PI-RADS 4–5 warrant MRI-targeted biopsy.
- What are the limits and cautions when using Prostate PI-RADS v2.1 Score?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Prostate PI-RADS v2.1 Score calculated in practice? Can you show a worked example?
- Inputs: Lesion zone Peripheral zone PZ (DWI dominant), DWI/ADC score 1, T2WI score 1, DCE dynamic enhancement Positive (focal early enhancement at the suspicious lesion) → Result: Score PI-RADS 1（Score: PI-RADS 1 (clinically significant cancer detection rate ~3%), Basis: PZ is DWI-dominant; DWI = 1 → PI-RADS 1, Management: Clinically significant cancer highly unlikely: generally no biopsy; follow PSA/clinical） Inputs: Lesion zone Transition zone TZ (T2 dominant), DWI/ADC score 5, T2WI score 5, DCE dynamic enhancement Negative → Result: Score PI-RADS 5（Score: PI-RADS 5 (clinically significant cancer detection rate ~83%), Basis: TZ is T2-dominant; T2 = 5 → PI-RADS 5, Management: Clinically significant cancer highly likely: MRI-targeted biopsy recommended）