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，并分别探究了其与全股骨、股骨颈、股骨转子、股骨转子间区及股骨沃德三角的髋部骨密度值的相关性。基于上述相关性，我们构建了前臂皮质骨相对横截面积与各部位髋部骨密度之间的线性转换关系。我们为28名受试者通过锥形束计算机断层扫描（CBCT）获取前臂影像，并采用双能X射线吸收法（DXA）测量了其全股骨、股骨颈、股骨转子、股骨转子间区及股骨沃德三角的髋部骨密度。