Fig. 1
From: CT-derived sarcopenia should not preclude surgical stabilization of traumatic rib fractures
Example of segmentation of a computed tomography image with boundary lines between external air and subcutaneous fat (1), between subcutaneous fat and abdominal wall/paraspinal muscles (2), and between abdominal wall/paraspinal muscles and visceral fat (3). The box around the paraspinal muscles allows the algorithm to separately calculate the paraspinal muscle area (if this information is desired)