Correlation of Psoas Muscle Index with Fragility Vertebral Fracture: A Retrospective Cross-Sectional Study of Middle-Aged and Elderly Women

Figure 1

The two images are the CT scan localization image and the CT axial image of a 58-year-old woman with a height of 1.6 m, respectively. (a) The localization image showed that plane of the line 28 was the middle level of the L3 vertebral body. (b) One radiologist manually delineated the edge of the bilateral psoas muscle on the CT axial image of the L3 level. The bilateral psoas muscle area was calculated automatically by the software. The right psoas muscle area was 663 mm², and the left psoas muscle area was 662 mm². According to the calculation formula, the PMI was equal to 517.6 mm²/m².

(a)

(b)