A Pilot Study on Hip Bone Mineral Densities Estimation from Forearm CBCT Images

In this paper, we defined the relative cross-sectional area of forearm cortical bone and investigated its correlation with hip bone mineral density values of total femur, femoral neck, femoral trochanter, femoral inter-trochanter and femoral ward’s triangle, respectively. Based on the correlations, we established a linear transformation between the relative cross-sectional area of forearm cortical bone and each hip bone BMD. We obtained forearm images using CBCT and hip bone BMDs of total femur, femoral neck, femoral trochanter, femoral inter-trochanter and femoral ward’s triangle using dual-energy X-ray absorptiometry (DXA) for 28 subjects.

本研究中，我们定义了前臂皮质骨相对横截面积，并分别探讨其与全股骨、股骨颈、股骨转子、股骨转子间区及股骨沃德三角区的髋部骨密度值的相关性。基于上述相关性，我们建立了前臂皮质骨相对横截面积与各髋部骨密度（Bone Mineral Density，BMD）之间的线性转换关系。我们招募了28名受试者，通过锥形束计算机断层扫描（Cone Beam Computed Tomography，CBCT）获取前臂影像，并采用双能X线吸收法（Dual-energy X-ray absorptiometry，DXA）检测其全股骨、股骨颈、股骨转子、股骨转子间区及股骨沃德三角区的髋部骨密度。