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首页> 外文期刊>Journal of orthopaedic research >Comparison of tibiofemoral joint space width measurements from standing CT and fixed flexion radiography
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Comparison of tibiofemoral joint space width measurements from standing CT and fixed flexion radiography

机译：胫骨型接头空间宽度测量与固定CT和固定屈曲射线照相的比较

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The objective of this project was to determine the relationship between medial tibiofemoral joint space width measured on fixed-flexion radiographs and the three-dimensional joint space width distribution on low-dose, standing CT (SCT) imaging. At the 84-month visit of the Multicenter Osteoarthritis Study, 20 participants were recruited. A commercial SCT scanner for the foot and ankle was modified to image knees while standing. Medial tibiofemoral joint space width was assessed on radiographs at fixed locations from 15% to 30% of compartment width using validated software and on SCT by mapping the distances between three-dimensional subchondral bone surfaces. Individual joint space width values from radiographs were compared with three-dimensional joint space width values from corresponding sagittal plane locations using paired t-tests and correlation coefficients. For the four medial-most tibiofemoral locations, radiographic joint space width values exceeded the minimal joint space width on SCT by a mean of 2.0mm and were approximately equal to the 61st percentile value of the joint space width distribution at each respective sagittal-plane location. Correlation coefficients at these locations were 0.91-0.97 and the offsets between joint space width values from radiographs and SCT measurements were consistent. There were greater offsets and variability in the offsets between modalities closer to the tibial spine. Joint space width measurements on fixed-flexion radiographs are highly correlated with three-dimensional joint space width from SCT. In addition to avoiding bony overlap obscuring the joint, a limitation of radiographs, the current study supports a role for SCT in the evaluation of tibiofemoral OA. (c) 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1388-1395, 2017.
机译：该项目的目的是确定在固定屈曲射线照片上测量的内侧胫芯关节空间宽度与低剂量上的三维关节空间宽度分布之间的关系，站立CT（SCT）成像。在84个月的多中心骨关节炎研究的访问中，招募了20名参与者。脚和脚踝的商业SCT扫描仪被修改为在站立时的图像膝盖。通过使用验证的软件和SCT通过绘制三维子骨头骨表面之间的距离，在固定位置的射线照片上评估内侧胫骨宽度的关节空间宽度。使用配对T检验和相关系数的相应矢状面积与三维关节空间宽度值进行比较来自射线照相的各个关节空间宽度值。对于四个内侧的胫甲仪位置，射线照相关节空间宽度值以2.0mm的平均值超过了SCT上的最小关节空间宽度，并且在每个相应的矢状平面位置处大致等于接合空间宽度分布的第61百分位值。这些位置处的相关系数为0.91-0.97，并且射线照片与SCT测量的关节空间宽度值之间的偏移是一致的。在更接近胫骨脊柱的换挡之间的偏移中存在更大的偏移和可变性。固定屈曲X线片上的关节空间宽度测量与来自SCT的三维关节空间宽度高度相关。除了避免骨骼重叠遮挡关节之外，目前的研究对射线照相的限制支持SCT在评估胫脂型OA时的作用。 （c）2017年骨科研究会。由Wiley期刊出版，Inc.J Orthop Res 35：1388-1395,2017。

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