Liver Imaging Reporting & Data System (LI-RADS®)

LIRADS_320LI-RADS® was created to standardize the reporting and data collection of CT and MR imaging for hepatocellular carcinoma (HCC).

This method of categorizing liver findings for patients with risk factors for developing HCC allows the radiology community to:

  • Apply consistent terminology
  • Reduce imaging interpretation variability and errors
  • Enhance communication with referring clinicians
  • Facilitate quality assurance and research

LI-RADS® CT/MRI and LI-RADS® US are consistent with and integrated into the American Association for the Study of Liver Diseases (AASLD) 2018 hepatocellular carcinoma (HCC) clinical practice guidance.

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Liver Imaging Reporting and Data System (LI-RADS®) by American College of Radiology is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Permissions beyond the scope of this license may be available here.

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LI-RADS Lexicon as of June 2021.


The LI-RADS® Ultrasound covers everything needed to apply LI-RADS® US Screening and Surveillance algorithm.


Treatment Response Assessment


CT/MRI Manual

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Chapter 1 – LI-RADS Introduction — What, Mission, Vision

Chapter 2 – LI-RADS screening surveillance diagnosis staging

Chapter 3 – Liver Anatomy

Chapter 4 – Cirrhosis

Chapter 5 – Cirrhosis- associated lesions

Chapter 6 – Hepatocarcinogenesis

Chapter 7 – The LI-RADS observation

Chapter 8 – LI-RADS Diagnostic categories

Chapter 9 – Treatment Response

Chapter 10 – Staging

Chapter 11 – Management

Chapter 12 – LI-RADS Technique

Chapter 13 – HBA

Chapter 14 – LI-RADS Reporting

Chapter 15 – Benign entities

Chapter 16 – Imaging features



ACR disclaims liability for any acts or omissions that occur related to an individual's or entity's use of ACR's RADS, including but not limited to, translations of a specific RADS work.

For a full list of RADS Translated documents, please visit the RADS Translations page.

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