椎体骨折是脊柱骨质疏松的最重要表现之一。临床上应用双能吸收测量学估价椎体骨折危险性,是根据骨矿含量(BMC)的测定,或骨矿密度(BMD),即BMC除扫描面积得出的测量值来进行估价的。作者这项研究的目的在于以体模实验方式确定侧位DXA测量胸腰椎BMC的准确性,并检验胸椎BMC及BMD的节段性变异。方法:对9具经福尔马林浸泡的脊柱进行尸体解剖得到T_1～L_5段椎骨,普通X线片检查排除了样品存在有骨病、 Vertebral fracture is one of the most important manifestations of spinal osteoporosis. The clinical application of dual-energy absorptiometry to assess the risk of vertebral fractures is based on measurements of bone mineral content (BMC) or bone mineral density (BMD), ie measurements taken by the BMC in addition to the scanned area. The aim of this study was to determine the accuracy of lateral DXA in measuring thoracolumbar BMC by phantom and to examine segmental variations of BMC and BMD in the thoracic spine. Methods: T_1 ~ L_5 vertebrae were obtained from 9 autopsy of formalin-infused spine. The common X-ray examination excluded the existence of bone disease,