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| 定量CT测量膝关节骨密度的重复性研究 |
| The reproducibility of Knee Bone Mineral Density ( BMD ) measured by Quantitative CT |
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| DOI： |
| 中文关键词: 骨密度；膝关节；定量CT 前交叉韧带；可重复性 |
| 英文关键词:Bone mineral density Knee quantitative CT Reproducibility |
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| 中文摘要: |
| 目的探讨定量CT( QCT)测量膝关节骨密度（BMD )的重复性研究。方法选取北京积水潭 医院确诊为一侧膝关节前交叉韧带损伤（未经治疗），另一侧膝关节健康的30名患者行双膝关节 QCT骨密度检测，2名观察者用定量CT的测量技术前后两次独立测量患者双膝关节股骨远端内外侧 髁及胫骨平台处骨密度。结果双因素方差分析，除双膝关节胫骨平台内上1/9处BMD值统计学有 差异（P <0.05 ,ICC >0.7 )，同一观察者不同时间测量同一部位的BMD值均值相近，无统计学差异（P >0.05，ICC >0. 9 )。不同观察者所测定的BMD值也无显著性差别（P >0.05，ICC >0.9 )。结论定 量CT能够测量膝关节松质骨的体积骨密度，并且重复性良好，可用于评价膝关节骨密度的状态及应 用于临床 |
| 英文摘要: |
| Objective To evaluaLe Lhe reproducibiliLy of Lhe knee bone mineral densiLy (BMD ) measuremenL by quanLiLaLive CT( QCT ). Methods The knee BMD was measured by QCT in 30 subjecLs wiLh unilaLeral anLerior cruciaLe JigamenL( ACL ) injury. Using QCT，Lwo observers measured Lhe BMD of medial and laLeral condyle of disLal remur and Libial plaLeau of boLh knees，respecLively. Results There was no sLaLisLically significanL differences beLween Lhe resulLs of Lhe Lwo observers ( P > 0. 05，ICC > 0. 9 ) or beLween Lhe resulLs of Lhe Lwo diilerenL Limes ( P > 0. 05，ICC > 0. 9 ) Lhrough Lwo-way analysis of variance， excepL Lhe BMD of 1/9 secLion of Libial plaLeau( P <0. 05，ICC >0.7 ). Conclusion QCT can be used Lo measure Lhe knee bone mineral densiLy wiLh high reproducibiliLy. |
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