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Eur Radiol:如何准确地对膝关节骨关节炎分级?

2021-03-12 shaosai MedSci原创

EOS成像的EOS 2D/3D成像系统是一种可以在站立和正常负重条件下获取全身或某个部位图像的新兴技术。

    EOS成像的EOS 2D/3D成像系统是一种可以在站立和正常负重条件下获取全身或某个部位图像的新兴技术。EOS所获得的图像在垂直方向上与实际大小一致,不需要图像拼接。

    膝关节骨关节炎(OA)是发达国家最常见的10种疾病之一,多达三分之一的老年人患有相关的疾病。为了在x线平片上评估关节退行性变的等级,影像上通过评价关节间隙狭窄、软骨下硬化、骨赘的存在和关节面变形对股骨和胫骨进行分级和评估。

    对于需要治疗的膝关节骨性关节炎患者,标准的做法是行肢体的正侧位x线平片,并在站立位进行长腿成像,以评估骨性关节炎的等级,并检测是否有如外翻和内翻畸形等畸形的存在。这些征象是否存会影响临床对患者治疗方案的制定及手术方法选择。若EOS下肢成像技术能够可靠地检测到膝关节退行性病变并进行分级,那么就可以在低剂量的基础上,仅进行一次检查完成对膝关节OA的评估。


   近日,发表在European Radiology杂志的一项研究通过使用最常用的OA评分系统,比较了下肢EOS图像与膝关节常规x线片(CR)在骨关节炎分级方面的准确性,为临床提供了一个更便捷且辐射剂量更低的评价OA的影像学方法。

    本研究纳入了142例患者,每位患者均在同一天行下肢EOS及膝关节x线检查。OA分级采用Kellgren和Lawrence评分(KL)以及国际骨关节炎研究协会(OARSI)系统。另外,对关节间隙进行测量并对两种方法对测量结果进行了比较。将EOS图像与构成金标准的膝关节前后位x线片进行比较。

    关节间隙的测量显示出非常好的类间相关性。EOS与CR的KL评分加权kappa计算结果均极好。OARSI评分的不同参数的比较显示,骨赘和关节间隙狭窄的加权kappa评分在0.9 ~ 0.96(α< 0.001)之间。EOS与x线片参数畸变显示出良好的一致性(敏感性93.6%;特异性100%)。对于硬化参数来说,总体敏感性为71.3%,特异性为99.3%。

表1 OARSI结果第一部分

表2 OARSI结果第二部分

    在EOS图像上使用KL评分对OA进行分级以及对关节间隙宽度的定量评估可以得到与CR一样可靠的结果。因此,EOS可以有效且安全地应用于膝关节骨关节炎的初步评估,以确定骨关节炎改变的存在并进行分级。然而,在膝关节置换术前,除了需行长腿EOS成像外,还需要获取膝关节2 ~ 3个平面的常规x线片检查作为补充。

在线使用:

膝关节AKS评分

HSS膝关节评分标准

膝关节WOMAC评分量表


原始出处:

Vanessa Kristina Anna Koliogiannis,Martina Brandlhuber,Viktoria Messerschmidt,et al. Is the EOS imaging system as accurate as conventional radiography in grading osteoarthritis of the knee?DOI:10.1007/s00330-020-07187-9

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    2021-11-15 lisa438
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    2021-04-03 zy&kt

    学习

    0

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    2021-03-14 lmm397
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