Prediction of Osteoporosis at the Sacrum Using Opportunistic CT of the Abdomen and Pelvis: A Retrospective Feasibility Study in 277 Patients Comparing CT and QCT Data. - Xiao, Yan; Li, Wen; Zhou, Wenqin; Wei, Miao; Long, Bangyuan; Pu, Jiayi; Lv, Fajin (Journal of Clinical Medicine, 2026)