Table 1.
Anatomical definitions of fat and muscle compartments used for segmentations and quality control.
Fig 1.
Segmentation of fat and muscle compartments.
Sample compartmental segmentation result, coronal and transverse sections of a 61-years-old woman. (a) Intensity-corrected water images with muscle segmentations using overlay colours, 1. abdominal muscles, 2. anterior thigh, 3. lower leg muscles, 4. posterior thigh, (b) intensity-corrected fat images with fat segmentations using overlay colours, 5. abdominal subcutaneous adipose tissue, 6. visceral adipose tissue.
Fig 2.
Segmentation of individual muscles.
Sample individual muscle segmentation results of a 61-years-old woman. (a) Intensity-corrected water images with muscle segmentations using overlay colours, enlarged cutouts of central abdominal region 1. pectoralis major, 2. latissimus dorsi, 3. rhomboideus, (b) transverse sections covering the central abdominal region with muscle segmentations using overlay colours, and (c) sagittal cutouts of the central abdominal region with muscle segmentations using overlay colours.
Fig 3.
Region of interest placements in the liver.
Water and proton density fat-fraction (PDFF) liver images with region of interest (ROI) placements to assess liver-fat, in (a-b) a subject with low liver-fat content, and (c-d) a subject with higher liver-fat content. (a, c) Water images and (b, d) PDFF images.
Table 2.
Descriptive statistics and ranges for volumes and liver fat.
Table 3.
Descriptive statistics and ranges for muscle fat infiltration.
Table 4.
Precision statistics for muscle and fat volumes as well as liver fat.
Table 5.
Precision statistics for muscle fat infiltration.
Fig 4.
Bland-Altman plots of fat compartments.
Bland-Altman plots of (a) liver-fat, (b) visceral adipose tissue, and (c) abdominal subcutaneous adipose tissue. Note: Different ranges on y-axes.
Fig 5.
Bland-Altman plots of muscle compartments and individual muscles.
Bland-Altman plots of (a) total thigh, (b) lower leg, (c) abdomen, (d) latissimus, (e) pectoralis, and (f) rhomboideus. For bilateral muscles (b-f) left and right sides are pooled in the plots. Note: Different ranges on y-axes.
Fig 6.
Bland-Altman plots of muscle fat infiltration (MFI).
Bland-Altman plots of (a) total thigh, (b) lower leg, (c) abdomen, (d) latissimus, (e) pectoralis, and (f) rhomboideus. For bilateral muscles (b-f) left and right sides are pooled in the plots. Note: Different ranges on y-axes.