双能X线骨密度仪测量双侧前臂骨面积、骨矿含量和骨矿密度的比较

目的比较健康人优势和非优势前臂的骨面积（Ａｒｅａ）、骨矿含量（ＢＭＣ）和骨矿密度（ＢＭＤ）。方法采用双能Ｘ线骨密度仪测量５５例１６～７３岁（平均年龄５２岁）健康志愿者双侧前臂（优势臂均为右臂）的Ａｒｅａ、ＢＭＣ和ＢＭＤ。结果右前臂各部位Ａｒｅａ、ＢＭＣ显著高于左前臂（Ｐ＜０．００１和Ｐ＜０．０５），除桡骨远端１／３段ＥＭＤ右前臂显著高于左前臂外（Ｐ＜０．０１），其余部位ＢＭＤ左右侧无差别。结论优势臂的Ａｒｅａ和ＢＭＣ均高于非优势臂，而ＢＭＤ两者差别不大。

Bilanteral comparison of bone area, BMC and BMD in forearm by DEXA

Objective To compare bone area(Area), bone mineral content(BMC)and density(BMD) between dominant and nondonminant forearm in normal subjects. Method Area, BMC and BMD were measured by dual energy X-ray absorptiometry(DEXA)in both forearms in 55 normal volunteers (all of whom were right handed), 16 to 73 years of age (mean age 52 years). Result Area and BMC of the right forearmwere significantly higher than those of the left forearm at all measurement sites P < 0. 001 and P < 0. 05, respeCtively ). Except that BMD at distal one third radius in the right forearm was significantly higher than that of the corresponding site in the left forearm (P < 0. 01 ), no significant left/right differences were observed between forearms. Conclusion Area and BMC of the dominant forearm are significantly higher than the nondominant forearm. There is strong agreement between the two forearms in BMD.