Noninvasive Quantification of Hepatic Steatosis Using Ultrasound-Derived Fat Fraction (CHESS2303): A Prospective...

Area of Science:

• Hepatology
• Medical Imaging
• Diagnostic Performance

Background:

• Hepatic steatosis assessment lacks standardized quantitative methods.
• Ultrasound-derived fat fraction (UDFF) offers a non-invasive approach.
• Multicenter validation of UDFF for hepatic steatosis is needed.

Purpose of the Study:

• Evaluate UDFF's diagnostic and grading performance for hepatic steatosis.
• Compare UDFF against MRI-proton density fat fraction (MRI-PDFF) as the reference standard.
• Establish UDFF cutoff values for mild, moderate, and severe hepatic steatosis.

Main Methods:

• Prospective recruitment of 300 participants across eight hospitals.
• Concurrent UDFF and MRI-PDFF examinations for all participants.
• Statistical analysis including correlation and ROC curve analysis.

Main Results:

• UDFF demonstrated strong positive correlation with MRI-PDFF (R=0.80, p<0.001).
• Optimal UDFF cutoffs showed excellent diagnostic performance (AUCs 0.90-0.91) for grading steatosis.
• UDFF effectively distinguished between mild, moderate, and severe hepatic steatosis.

Conclusions:

• UDFF is a reliable quantitative tool for hepatic steatosis.
• UDFF exhibits excellent diagnostic accuracy in detecting and grading liver fat content.
• This multicenter study validates UDFF's clinical utility in liver disease assessment.