Figure 2 | Scientific Reports

Figure 2

From: Age- and BMI-related variations of fat distribution in sacral and lumbar bone marrow and their association with local muscle fat content

Figure 2

(A) Color-coded PDFF map of a 22-year-old male subject (BMI: 23.5 kg/m2, mean PDFF of sacrum: 37.3%; vertebral body L5: 22.2%; gluteal muscles: 5.8%; paraspinal: 10.7%). (B) Color-coded PDFF map of a 21-year-old female subject (BMI: 23.6 kg/m2, mean PDFF of sacrum: 36.8%; vertebral body L5: 28.0%; gluteal muscles: 6.3%; paraspinal: 13.9%). (C,D) show increased PDFF for the bone marrow compartments (sacrum and L5) as well as the local musculature compared to the younger subject in (A). (C) 45-year-old male subject (BMI: 26.8 m/kg2, mean PDFF of sacrum: 66.5%; gluteal muscles: 23.1%) (D) 57-year-old male subject (BMI: 24.0 kg/m2, vertebral body L5: 49.7%; paraspinal muscles: 10.9%). A color-coded scale bar displaying a spectrum from 0 to 100% can be seen at the right side. BMI: body mass index, PDFF: proton density fat fraction.

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