Fig. 6From: Analysis of trabecular bone microstructure in osteoporotic femoral heads in human patients: in vivo study using multidetector row computed tomographyStructure model index (SMI) in the proximal head and neck. a The SMI in the apical area was significantly lower in ROI 1 than in ROI 2 and ROI 3, and was significantly lower in ROI 2 than in ROI 3. b The SMI in ROI 5 was significantly lower than in the other ROIs in the neck area. *p < 0.05, **p < 0.01Back to article page