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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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摘要

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：本项目的目的是确定固定屈曲X线片测量的胫股内侧关节间隙宽度与低剂量站立CT（SCT）成像的三维关节间隙宽度分布之间的关系。在多中心骨关节炎研究的84个月随访中，招募了20名参与者。一个用于足部和脚踝的商业SCT扫描仪被修改成站立时的膝盖图像。使用经验证的软件，在固定位置的X线片上评估内侧胫股关节间隙宽度，其范围为间隙宽度的15%至30%，并通过绘制三维软骨下骨表面之间的距离，在SCT上评估内侧胫股关节间隙宽度。使用配对t检验和相关系数，将来自X线照片的单个关节间隙宽度值与来自相应矢状面位置的三维关节间隙宽度值进行比较。对于最内侧的四个胫股关节位置，放射学关节间隙宽度值超过SCT上的最小关节间隙宽度，平均值为2.0mm，大约等于每个矢状面位置关节间隙宽度分布的第61个百分位值。这些位置的相关系数为0.91-0.97，来自X线照片和SCT测量的关节间隙宽度值之间的偏移量是一致的。在更靠近胫骨脊柱的模式之间，有更大的偏移量和可变性。固定屈曲X线片上的关节间隙宽度测量值与SCT的三维关节间隙宽度高度相关。除了避免骨重叠遮挡关节（这是X线照片的一个限制），目前的研究支持SCT在评估胫股OA中的作用。（c） 2017骨科研究学会。由威利期刊公司出版，《矫形外科杂志》35:1388-13952017。

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