From: Proton density fat fraction of the spinal column: an MRI cadaver study
Bone type
Distance from contour
ROI0
Cortical bone
−1 mm to 0 mm
ROI1
PCZ1
0 mm to 1 mm
ROI2
PCZ2
1 mm to 2 mm
ROI3
PCZ3
2 mm to 3 mm
ROI4
Cancellous bone
\(\ge \) 3 mm