Experimental: Quantitative Ultrasound Fat Fraction Assessment

All enrolled participants undergo two non-invasive diagnostic imaging procedures within a 7-day window for direct comparison of liver fat quantification methods:~1. \*\*Quantitative Ultrasound Examination\*\*: Performed using Samsung RS85 ultrasound system with CA1-7S convex probe to obtain ultrasound fat fraction (DeepUSFF). The examination includes standard liver ultrasound assessment followed by quantitative fat fraction measurements in the right hepatic lobe (S5 or S8 segments). Multiple measurements (5 per session) are obtained during breath-holding to ensure reproducibility. Total examination time: approximately 10-15 minutes.~2. \*\*Non-contrast Liver MRI with PDFF\*\*: Magnetic resonance imaging with proton density fat fraction (MRI-PDFF) sequence and MR elastography performed within 7 days of the ultrasound examination. The MRI protocol includes breath-hold sequences (10-20 seconds each) for optimal image quality. Total examination time: approximately 15 minutes.