MRI in a 65-year-old male participant with low likelihood of advanced
fibrosis according to the fibrosis based on four factors (FIB-4) index.
(A) Axial MRI proton density fat fraction map shows
regions of interest (green circles) drawn in each Couinaud segment while
avoiding any vessels or lesions, as per the study protocol.
(B) Coronal image shows body composition with
autosegmented visceral (pink) and subcutaneous (blue) adipose tissue.
(C) Left to right: Axial elastogram, magnitude, and
wave images obtained at two-dimensional MR elastography (MRE) show
placement of the region of interest (dotted outline) in the region of
parallel wave propagation, avoiding the outer edge of the liver.
(D) Left to right: Axial elastogram, magnitude, and
wave images obtained at three-dimensional MRE similarly show the region
of interest (dotted outline) in a region of parallel wave propagation,
avoiding the outer margin of the liver. Color bars alongside elastograms
indicate a range of kilopascals from low (purple) to high (red).