Head-to-head comparison of the Lyon Schuss and fixed flexion radiographic techniques. Long-term reproducibility in normal knees and sensitivity to change in osteoarthritic knees
Head-to-head comparison of the Lyon Schuss and fixed flexion radiographic techniques. Long-term reproducibility in normal knees and sensitivity to change in osteoarthritic knees
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DOI：
10.1136/ard.2007.077834
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发表时间：
2008-11-01
影响因子：
27.4
通讯作者：
Wyman, B.
中科院分区：
文献类型：
--
作者：
Le Graverand, M-P Hellio;Vignon, E. P.;Wyman, B.
目的：里昂Schuss（LS）和固定屈曲（FF）膝关节视图在评价骨关节炎（OA）关节间隙狭窄（JSN）方面上级传统站立位前后位视图。两种器械的膝关节位置相同，但只有LS在X射线透视下将内侧胫骨平台（MTP）与X射线束对齐。本研究提供了第一个头对头比较的LS和FF views.Methods：在基线和12个月，62 OA和99对照膝关节成像两次在同一天与LS和FF的意见。通过计算机测量最小关节间隙宽度（mJSW），并根据MTP前后边缘之间的距离（边缘间距离，IMD）评估MTP对线。mJSW的测量和敏感性的变化Reproducibility进行了evaluated.Results：在正常膝关节，JSW没有变化超过12个月，无论是视图。在OA膝关节中，LS视图的12个月mJSN为0.22（0.43）mm，FF视图为20.01（0.46）mm（分别为p = 0.0002和p = 0.92）。LS的平均IMD仅为FF视图的一半（0.9（0.5）mm vs 1.9（1.2）mm，p < 0.0001）。结论：LS和FF X线片在JSW测量中提供了相似的再现性。然而，可能是由于其在对齐MTP方面的优势，LS视图对OA膝关节的JSN更为敏感。
Objective: The Lyon Schuss (LS) and fixed flexion (FF) views of the knee are superior to a conventional standing anteroposterior view in evaluating joint space narrowing (JSN) in osteoarthritis (OA). Both position the knee identically but only the LS aligns the medial tibial plateau (MTP) with the x-ray beam fluoroscopically. The present study provides the first head-to-head comparison of the LS and FF views.Methods: At baseline and 12 months, 62 OA and 99 control knees were imaged twice on the same day with LS and FF views. Minimum joint space width (mJSW) was measured by computer and MTP alignment was assessed from the distance between anterior and posterior margins of the MTP (intermargin distance, IMD). Reproducibility of measurements of mJSW and sensitivity to change were evaluated.Results: In normal knees, JSW did not vary over 12 months with either view. In OA knees, 12-month mJSN was 0.22 (0.43) mm with the LS view and 20.01 (0.46) mm with the FF view (p = 0.0002 and p = 0.92, respectively). Mean IMD was only half as large in LS as in FF views (0.9 (0.5) mm vs 1.9 (1.2) mm, p < 0.0001).Conclusions: LS and FF radiographs offer similar reproducibility in JSW measurement. However, presumably due to its superiority in aligning the MTP, the LS view is much more sensitive to JSN in OA knees.