Quantitative Ultrasound (RS85 and R20) for Liver Fat Quantification in MASLD Using MRI-PDFF as Reference

This multicenter prospective study aims to evaluate the correlation between quantitative ultrasound fat fraction (USFF) and MRI-PDFF (Proton Density Fat Fraction) for liver fat quantification in patients with metabolic dysfunction-associated steatotic liver disease (MASLD). The study will compare the diagnostic accuracy of quantitative ultrasound imaging against MRI-PDFF as the reference standard. ==\> V 4.0: Prospective multicenter study evaluating the correlation between Samsung Medison quantitative ultrasound (DeepUSFF) and MRI-PDFF in patients with MASLD across two ultrasound platforms (RS85 and R20). Total target enrollment 182 participants in two parallel device arms: RS85 arm (n=62; SNUH 31 + US site 31) and R20 arm (n=120; SNUH). Within the R20 arm, a paired-device substudy (n=60) evaluates interplatform reproducibility between R20 and RS85. Secondary objectives include intra- and inter-observer agreement of DeepUSFF on each platform.