Multiphase Enhancement & Washout (CT HU) — free guideline decision tool
Turn multiphase CT HU into numbers: net enhancement per phase, peak phase, absolute / relative washout and pattern, with the Bosniak 2019 enhancement call for renal masses. Instant, browser-side.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
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.
| Unenhanced HU | 35 HU |
|---|---|
| Arterial HU (optional) | 120 HU |
| Portal venous / nephrographic HU (optional) | 95 HU |
| Delayed HU (optional) | 60 HU |
| Lesion context | Renal mass |
→Max net enhancement+85HU
- Arterial：120 HU (net +85 HU)
- Portal venous：95 HU (net +60 HU)
- Delayed：60 HU (net +25 HU)
Common questions
What is Multiphase Enhancement & Washout (CT HU)?
Turn multiphase CT HU into numbers: net enhancement per phase, peak phase, absolute / relative washout and pattern, with the Bosniak 2019 enhancement call for renal masses. Instant, browser-side.
How is Multiphase Enhancement & Washout (CT HU) calculated? What is the core formula?
Net = post − pre; absolute washout = (peak − last)/(peak − pre)×100; relative washout = (peak − last)/peak×100.
When is Multiphase Enhancement & Washout (CT HU) used?
Characterizing liver, renal, pancreatic or adrenal lesions on multiphase CT and documenting enhancement in the report.
What are the key clinical points for Multiphase Enhancement & Washout (CT HU)?
Renal mass ≥20 HU = enhancing. 10–19 HU equivocal; consider MRI/CEUS. Early enhancement with washout pattern. Consistent ROIs are essential.
What are the limits and cautions when using Multiphase Enhancement & Washout (CT HU)?
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 Multiphase Enhancement & Washout (CT HU) 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 Multiphase Enhancement & Washout (CT HU) calculated in practice? Can you show a worked example?
Inputs: Unenhanced HU 35 HU, Arterial HU (optional) 120 HU, Portal venous / nephrographic HU (optional) 95 HU, Delayed HU (optional) 60 HU, Lesion context Renal mass → Result: Max net enhancement +85 HU（Arterial: 120 HU (net +85 HU), Portal venous: 95 HU (net +60 HU), Delayed: 60 HU (net +25 HU)）
Run Multiphase Enhancement & Washout (CT HU) now
Turn multiphase CT HU into numbers: net enhancement per phase, peak phase, absolute / relative washout and pattern, with the Bosniak 2019 enhancement call for renal masses. Instant, browser-side.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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