单能量X线测定骨密度的初步分析

The preliminary analysis of Single Energy X-ray(SXA) in measuring bone mineral density

目的 :了解温州地区人群不同年龄组骨质疏松患病率及同年龄组男女骨质疏松患病率的差异 ,强调早期预防治疗老年人及绝经期妇女骨质疏松的重要性。方法 :应用单能量X线 (SXA)骨密度仪测量 2 4 6例正常人的右跟骨骨密度。结果 :男性大于 6 0岁组较小于 6 0岁组者骨密度 (BMD)降低明显 (P <0 .0 5 ) ;女性5 0岁以上组与小于 5 0岁组相比 ,BMD下降差异有极显著性 (P <0 .0 1) ;各年龄组男女相比 ,男性BMD明显高于女性 (P <0 .0 5 )。结论 :女性骨质疏松症的发病大多以绝经后为主 ,雌激素在维持骨量方面具有重要的作用。SXA检测的跟骨含 95 %小梁骨 ,能较好地确定骨质疏松的风险水平 ,且其具有价廉、简便、快捷、较准确等特点 。

Objective:To emphasize the importance of early prevention and treatment of osteoporosis in aged people and postmenopausal women.Different osteoporosis prevalence of the different age groups and the difference between males and females of the same age group in Wenzhou population were studied.Methods:246 healthy subjects(102 males, age 54.3±15.6 years;144 females, aged 52.7±14.2years) were recruited for right heel bone mineral density. BMD was measured by single energy X ray (SXA).Results:Significant decrease of BMD was found between male groups (>60 years) and female groups (>50 years),P<0.05 and P<0.01 respectively. Among each age group, male's BMD was higher than female's significantly. Conclusion:An acceleration of bone mineral loss was predominantly shown in postmenopausal women,more significant than men of the same age. It is indicated that osteoporosis appeared mainly in postmenopause women and estrogen may play a most important role in maintaining bone mineral density. SXA examined heel bone which comprises 95% trabeculae and could well determine the risk of osteoporosis. Furthermore, it was cheaper,more convenient,quicker and preciser.Consequently, this method was a kind of good means for clinical examination.