CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos) — free guideline decision tool
Unenhanced liver and spleen HU give L−S and L/S with a steatosis cue; spleen diameters give splenic index and estimated volume. 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.
| 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)
Common questions
What is CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos)?
Unenhanced liver and spleen HU give L−S and L/S with a steatosis cue; spleen diameters give splenic index and estimated volume. Instant, browser-side.
How is CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos) calculated? What is the core formula?
L−S = liver HU − spleen HU; L/S = liver HU / spleen HU; spleen volume (mL) = 30 + 0.58 × L × W × T (cm, Prassopoulos).
When is CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos) used?
Quantifying fatty liver and splenomegaly on abdominal CT reports.
What are the key clinical points for CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos)?
Liver <40 HU suggests ≥30% steatosis. L−S < −10 HU equivalent. L/S <1.0 suggests steatosis. Spleen length >13 cm suggests splenomegaly.
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)）
Run CT Hepatic Steatosis & Spleen Volume (L−S, L/S, Prassopoulos) now
Unenhanced liver and spleen HU give L−S and L/S with a steatosis cue; spleen diameters give splenic index and estimated volume. Instant, browser-side.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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