LI-RADS CT/MRI Treatment Response Assessment Update in 2024

Area of Science:

• Radiology
• Oncology
• Medical Imaging

Background:

• The Liver Imaging Reporting and Data System (LI-RADS) CT/MRI treatment response assessment (TRA) was established in 2017.
• Standardized evaluation of treatment response is crucial for hepatocellular carcinoma (HCC) following loco-regional therapy.

Purpose of the Study:

• To introduce the revised LI-RADS CT/MRI TRA v2024.
• To detail the updated framework for assessing treatment response in HCC patients.

Main Methods:

• The v2024 revision introduces a bifurcated algorithm based on loco-regional therapy mechanisms.
• Distinct assessment criteria are presented for evaluating treatment response after radiation therapy.
• Ancillary imaging features like diffusion restriction and T2 hyperintensity are incorporated as optional adjuncts.

Main Results:

• The updated system aims to refine the assessment of viable tumors.
• The bifurcated algorithm and new criteria are designed for more precise treatment response evaluation.
• Incorporation of ancillary features provides additional data for assessment.

Conclusions:

• The LI-RADS CT/MRI TRA v2024 is expected to enhance treatment response assessment for HCC.
• Continuous research is encouraged for ongoing refinement and optimization of the assessment criteria.