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🔬 Prostate Volume (Ellipsoid) & PSA Density (PSAD)

UseReporting prostate volume on MRI or TRUS and deciding on biopsy.

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SourceTurkbey B, et al. PI-RADS v2.1. Eur Urol 2019;76:340-351

Runs locally in your browser (no PHI uploaded). For licensed clinicians — not a substitute for clinical judgement.
Stored on this device for revisit reminders

This-shift next steps

After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.

Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.

Methodology · worked example, guidelines & full notes
Clinical takeaway

Volume = L×W×H×0.52.

When to use

Reporting prostate volume on MRI or TRUS and deciding on biopsy.

How it works

Volume = L × W × H × 0.52 (mL); PSAD = PSA / volume.

Key points

  • Volume = L×W×H×0.52.
  • PSAD = PSA / volume.
  • 0.15 is the traditional cut-off.
  • Stratify together with PI-RADS.

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.

PSA6.5 ng/mL
Length (sagittal craniocaudal)4.5 cm
Width (axial transverse)4.8 cm
Height (anteroposterior)3.6 cm
PI-RADS (optional)PI-RADS 3

→PSAD0.161ng/mL²

  • Prostate volume：40.4 mL (4.5×4.8×3.6×0.52); >30 mL enlarged
  • PSAD：0.161 ng/mL²
  • Biopsy cue：PI-RADS 3 with PSAD 0.10–0.20: intermediate; decide biopsy vs surveillance with clinical factors and patient preference.
Verification & sources · governance
FAQ

Frequently asked questions

What are the limits and cautions when using Prostate Volume (Ellipsoid) & PSA Density (PSAD)?
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.
Does Prostate Volume (Ellipsoid) & PSA Density (PSAD) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is Prostate Volume (Ellipsoid) & PSA Density (PSAD) calculated in practice? Can you show a worked example?
Inputs: PSA 6.5 ng/mL, Length (sagittal craniocaudal) 4.5 cm, Width (axial transverse) 4.8 cm, Height (anteroposterior) 3.6 cm, PI-RADS (optional) PI-RADS 3 → Result: PSAD 0.161 ng/mL²（Prostate volume: 40.4 mL (4.5×4.8×3.6×0.52); >30 mL enlarged, PSAD: 0.161 ng/mL², Biopsy cue: PI-RADS 3 with PSAD 0.10–0.20: intermediate; decide biopsy vs surveillance with clinical factors and patient preference.）
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