📈 Multiphase Enhancement & Washout (CT HU)
UseCharacterizing liver, renal, pancreatic or adrenal lesions on multiphase CT and documenting enhancement in th…
SourceSilverman SG, et al. Bosniak Classification, Version 2019. Radiology 2019;292:475-488
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
Renal mass ≥20 HU = enhancing.
When to use
Characterizing liver, renal, pancreatic or adrenal lesions on multiphase CT and documenting enhancement in the report.
How it works
Net = post − pre; absolute washout = (peak − last)/(peak − pre)×100; relative washout = (peak − last)/peak×100.
Key points
- Renal mass ≥20 HU = enhancing.
- 10–19 HU equivocal; consider MRI/CEUS.
- Early enhancement with washout pattern.
- Consistent ROIs are essential.
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.
| 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)
Verification & sources · governance
FAQ
Frequently asked questions
- 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)）