The American College of Radiology (ACR) has released the latest version of its Liver Imaging Reporting and Data System (LI-RADS) to standardize terminology and criteria in the interpretation and reporting of imaging examinations of the liver.
The classification system includes several modifications and enhancements compared to the previous version, including the following:
- Unification of LI-RADS and United Network for Organ Sharing (UNOS) Organ Procurement and Transplantation Network (OPTN) categorization
- Change from list format to algorithmic format for assignment of LI-RADS category codes
- Expansion of the LI-RADS lexicon of terms
- Incorporation of a comprehensive atlas that illustrates major and ancillary imaging features, as well as key lexicon terms
- Incorporation of management implications for each liver reporting category
- Incorporation of CT and MRI technical requirements
LI-RADS currently applies to patients with cirrhosis or those at risk for hepatocellular carcinoma.
![Axial images from unenhanced calcium score cardiac CT (left) and curved planar reformation images from CT angiography (right) show that higher long-term exposure to air pollution is associated with greater coronary artery calcium and more obstructive coronary artery disease (CAD). Top row: Images in a 68-year-old male patient with higher 10-year mean ambient air pollution exposure (7.9 μg/m3 for particulate matter measuring ≤2.5 μm in diameter [PM2.5] and 17.4 parts per billion [ppb] for NO2) with extensive CAD (coronary artery calcium score [CACS] >1,000 and obstructive CAD [≥70% diameter stenosis]). Bottom row: Images in a 57-year-old female patient with lower 10-year mean ambient air pollution exposure (6.3 μg/m3 for PM2.5 and 4.6 ppb for NO2) with no CAD (CACS = 0 and no obstructive stenosis).](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/06/hanneman.r6SMLzkezo.png?auto=format%2Ccompress&dpr=2&fit=crop&h=167&q=70&w=250)
