Body composition on MRI

MRSegmentator segments fat and abdominal muscle on MRI: visceral fat, three subcutaneous fat regions that add up to total subcutaneous fat, and left and right rectus abdominis, oblique, and quadratus lumborum muscles. It learned from Dixon and T2-HASTE scans. Abdominal subcutaneous fat starts at T9, and gluteofemoral fat ends at the knee. Studies use these whole volumes to compare groups and follow people over time.

Find answers to research questions like: How do fat and abdominal muscle volumes relate to health outcomes beyond body mass index? Do visceral and subcutaneous fat change in people whose weight stays the same? How well does a single slice stand in for the full volume?

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Axial slice of abdominal MRI, outlined: Visceral fat, Left rectus abdominis, Right rectus abdominis, Left oblique muscle, Right oblique muscle, Left quadratus lumborum, Right quadratus lumborum, Abdominal subcutaneous fat — Axial

Sagittal slice of abdominal MRI, outlined: Subcutaneous fat, Visceral fat, Left rectus abdominis, Left quadratus lumborum, Abdominal subcutaneous fat — Sagittal

Coronal slice of abdominal MRI, outlined: Subcutaneous fat, Abdominal subcutaneous fat — Coronal

Found in this example

Subcutaneous fat
Visceral fat
Left rectus abdominis
Right rectus abdominis
Left oblique muscle
Right oblique muscle
Left quadratus lumborum
Right quadratus lumborum
Abdominal subcutaneous fat

Also finds: Gluteofemoral fat

Example scan: abdominal MRI, AMOS dataset