Liver 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

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

License Information
Creative Commons License
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 Current Releases

LI-RADS Lexicon (terms and definitions)

LI-RADS Lexicon as of 1/1/2020

Access LI-RADS lexicon


LI-RADS version 2018 provides updated criteria for small (10-19 mm) LR-5 observations and a simplified definition for threshold growth.
Access CT/MRI LI-RADS v2018


CEUS LI-RADS is a standardized system for technique, interpretation, reporting, and data collection for contrast-enhanced ultrasound exams in patients at risk for developing HCC.
Access CEUS LI-RADS v2017

Ultrasound LI-RADS® v2017

The Ultrasound LI-RADS v2017 covers everything needed to apply US LI-RADS® Screening and Surveillance algorithm.
Access Ultrasound LI-RADS v2017

LI-RADS Translations

The LI-RADS translations are now available in nine languages. These translations have been vetted by members of the LI-RADS International Working Group, who speak these languages. The LI-RADS International Working Group is Chaired by Dr. An Tang.

The translations are available for 2017 and 2018. Please visit the modality page to view and download the translations.

Archived Releases

Future Releases

The ACR has announced the formation of a new working group:

Treatment Response (TR) LI-RADS Workgroup — Chaired by Dr. Richard K. Do, from Memorial Sloan Kettering Cancer Center

In collaboration with the LI-RADS Steering Committee, the LI-RADS TR WG will develop and refine a standardized system for the interpretation, reporting and data collection for treatment response assessment in patients who undergo liver-directed treatments for known or suspected HCC. The system will be called ACR TR LI-RADS, or TR LI-RADS for short. It will include a lexicon of controlled terminology, an illustrative atlas, reporting guidelines, and educational material. It will be updated as experience accrues, as knowledge add technology advance, and in response to user feedback.

LI-RADS Work Groups

Steering Committee
Chair: Claude B. Sirlin, MD, UC San Diego
Professor of Radiology and Vice-Chair of Translational Research

Vice-Chair: Victoria Chernyak, MD, MS, Montefiore Medical Center
Professor of Radiology and Interim Chief of Abdominal Imaging Section

Benign Lesions WG
Chair: Maxime Ronot, MD, PhD, Beaujon University Hospital, Clichy France
Professor, Department of Radiology

Chair: Yuko Kono, MD, UC San Diego Health
Gastroenterologist and Hepatologist, Associate Professor of Medicine

Evidence WG
Chair: Matthew McInnes, MD, FRCPC, University of Ottawa
Associate Professor of Radiology and Epidemiology and Associate Scientist in the Clinical Epidemiology Program (The Ottawa Hospital Research Institute)

Gaps in Knowledge WG
Chair: Mustafa Bashir, MD, Duke University
Associate Professor of Radiology and Medicine, Director of MRI and Director for Center for Advanced Magnetic Resonance Development

Hepatobiliary Agents WG
Chair: Jay Heiken, MD, Mayo Clinic
Professor of Radiology and Senior Associate Consultant, Division of Abdominal Imaging

International WG
Chair: An Tang, MD, MSc, FRCPC, University of Montreal
Associate Professor and Director of Abdominal Imaging Research

Management WG
Co-Chair: Elizabeth Hecht, MD, Columbia University Medical Center
Professor, Department of Radiology and Director, Cross-sectional Vascular Imaging

Co-Chair: Katherine Fowler, MD, UC San Diego
Associate Professor of Radiology

Outreach & Education WG
Co-Chair: Ania Kielar, MD, FRCPC, University of Toronto
Associate Professor of Radiology

Co-Chair: Khaled M Elsayes, MD, The University of Texas MD Anderson Cancer Center
Professor of Radiology

Pediatrics WG
Chair: Alexander J. Towbin, MD, Cincinnati Children’s Hospital
Associate Professor and Associate Chief, Operations and Informatics

Rad Path WG
Chair: Alessandro Furlan, MD, University of Pittsburgh Medical Center
Assistant Professor of Radiology and Chief of Body MRI

Reporting WG
Chair: TBN

Technique WG
Chair: Avinash Kambadakone Ramesh, MBBS, MD, Massachusetts General Hospital
Assistant Professor and Medical Director, Martha's Vineyard Hospital Imaging

Treatment Response WG
Chair: Richard Do, MD, PhD, Memorial Sloan Kettering Cancer Center
Associate Attending

Tech & Apps WG
Chair: Marc Kohli, MD, UC San Francisco
Associate Professor and Director of Imaging Informatics, Radiology and Biomedical Imaging

Ultrasound WG
Chair: Aya Kamaya, MD, Stanford University
Associate Professor

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