LI-RADS CT/MRI Radiation Treatment Response Assessment Version 2024: Category Redistribution and Short-Term Outcomes in Patients Undergoing 90Y Radioembolization for HCC

Background: LI-RADS CT/MRI Radiation Treatment Response Algorithm (TRA) version 2024 (v2024) addresses a pitfall of the earlier algorithm relating to expected persistent enhancement of hepatocellular carcinoma (HCC) responding to radiation. v2024 removes LR-TR Equivocal, introduces LR-TR Nonprogressing (stable or decreasing masslike enhancement), and more narrowly defines LR-TR Viable (new or increasing masslike enhancement).