摘要目的应用双能X线骨密度仪(DXA)在不同成像模式下在体测量骨小梁分数(TBS),评估其可重复性,并与骨密度(BMD)进行比较。方法选取快速阵列、阵列、高清晰度3种成像模式,每种模式有30例病人,每例病人行2次DXA检查,且检查间要进行重新定位。根据临床骨密度国际协会制定的指南测量BMD和TBS。变异系数(Co V)为标准差平方 Abstract Objective To evaluate the reproducibility of trabecular bone fraction (TBS) in vivo by dual-energy X-ray absorptiometry (DXA) in different imaging modalities and to compare with the BMD. Methods Three kinds of imaging modalities, rapid array, array and high definition, were selected. There were 30 patients in each mode. DXA examination was performed twice in each patient and repositioning was performed between examinations. BMD and TBS were measured according to guidelines developed by the International Society for Clinical BMD. The coefficient of variation (Co V) is the square of the standard deviation