Fig. 2

ROC curves of the CT attenuation values (HUs), value difference (△HUs) and ratio at the 4 positions in differentiating fracture and control groups. 2a ~ 2c shows the ROC curves of the HUs measured at the 4 planes in discriminating the acute fracture from control group, the old fracture from control group, and the acute fracture from the old fracture group. 2d ~ 2e shows the ROC curve for the △HUs and ratio in differentiating the acute and old fracture groups