Evaluation of SOS or BUA using QUS parameters based on the whole calcaneus bone has been shown to have better performance than a smaller circular ROI selected from a point with minimum density.

• 利用脚跟骨的QUS影像来评估骨密度时，考虑全跟骨区域的量化参数，会比只单纯考虑影像中最低密度或特定区域的量化参数来的好；