Update on Imaging-based Noninvasive Methods for Assessing Hepatic Steatosis in Nonalcoholic Fatty Liver Disease

Area of Science:

• Hepatology
• Medical Imaging
• Gastroenterology

Background:

• Nonalcoholic fatty liver disease (NAFLD) is a prevalent chronic liver condition affecting 25% of the global population.
• Risk factors include genetics, metabolic health, diet, and microbiota, leading to hepatic steatosis.
• NAFLD encompasses simple steatosis to severe forms like nonalcoholic steatohepatitis, fibrosis, and cirrhosis.

Purpose of the Study:

• To review current noninvasive imaging techniques for quantifying liver fat.
• To highlight the importance of early fatty liver assessment for disease reversal.
• To discuss the shift in terminology from NAFLD to metabolic dysfunction-associated fatty liver disease (MAFLD).

Main Methods:

• Review of current literature on noninvasive imaging modalities.
• Focus on ultrasound as a primary tool for liver fat quantification.
• Exploration of diagnostic criteria and follow-up strategies.

Main Results:

• Hepatic steatosis is a key characteristic of NAFLD/MAFLD.
• Accurate liver fat quantification is crucial for patient management and monitoring disease progression.
• Noninvasive imaging, especially ultrasound, offers a vital method for assessment.

Conclusions:

• Early detection and quantification of fatty liver are essential for managing NAFLD/MAFLD.
• Ultrasound plays a significant role in noninvasive liver fat assessment.
• Understanding MAFLD is critical due to its increasing global prevalence.