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LI-RADS® v2018 (CT/MRI)
Clinical Context & Background
The Liver Imaging Reporting and Data System (LI-RADS) assigns a category (LR-1 to LR-5) reflecting the probability of Hepatocellular Carcinoma (HCC). It applies to patients at high risk (cirrhosis, chronic HBV, or current/prior HCC). This calculator implements the CT/MRI Diagnostic Table.
Primary Source EvidenceAmerican College of Radiology (ACR). CT/MRI LI-RADS® v2018.
Formula Logic
Algorithm based on APHE, Size, Capsule, Washout, and Growth.Reference Data
| Category | Concept | Probability of HCC |
|---|---|---|
| LR-3 | Intermediate Probability | Variable |
| LR-4 | Probable HCC | High |
| LR-5 | Definite HCC | 100% Specificity (approx) |
| LR-M | Probably/Definitely Malignant (Not specific for HCC) | High (includes Cholangiocarcinoma/Mets) |
Evidence-based oncology decision support. Verify with clinical guidelines.