🫀 CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos)
UseQuantifying fatty liver and splenomegaly on abdominal CT reports.
SourcePark SH, et al. Radiology 2006;239:105-112
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
Liver <40 HU suggests ≥30% steatosis.
When to use
Quantifying fatty liver and splenomegaly on abdominal CT reports.
How it works
L−S = liver HU − spleen HU; L/S = liver HU / spleen HU; spleen volume (mL) = 30 + 0.58 × L × W × T (cm, Prassopoulos).
Key points
- Liver <40 HU suggests ≥30% steatosis.
- L−S < −10 HU equivalent.
- L/S <1.0 suggests steatosis.
- Spleen length >13 cm suggests splenomegaly.
References
- Park SH, et al. Radiology 2006;239:105-112
- Kodama Y, et al. AJR 2007;188:1307-1312
- Prassopoulos P, et al. Eur Radiol 1997;7:246-248
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.
| Liver HU (unenhanced, mean of ROIs) | 38 HU |
|---|---|
| Spleen HU (unenhanced) | 50 HU |
| Spleen length (craniocaudal) | 11 cm |
| Spleen width (max axial) | 9 cm |
| Spleen thickness (at hilum) | 4 cm |
→L−S-12HU
- Liver：38 HU — Liver <40 HU: moderate-to-severe steatosis (≥30%) likely
- L−S：-12 HU (< −10 HU: moderate-to-severe steatosis)
- L/S：0.76 (<1.0: steatosis)
Verification & sources · governance
FAQ
Frequently asked questions
- What are the limits and cautions when using CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos)?
- 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 CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos) 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 CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos) calculated in practice? Can you show a worked example?
- Inputs: Liver HU (unenhanced, mean of ROIs) 38 HU, Spleen HU (unenhanced) 50 HU, Spleen length (craniocaudal) 11 cm, Spleen width (max axial) 9 cm, Spleen thickness (at hilum) 4 cm → Result: L−S -12 HU（Liver: 38 HU — Liver <40 HU: moderate-to-severe steatosis (≥30%) likely, L−S: -12 HU (< −10 HU: moderate-to-severe steatosis), L/S: 0.76 (<1.0: steatosis)）