Despite being one of the most common indications for surgery, data on the types of meniscus tear that should be treated surgically are limited. Improving patient selection requires agreement on meniscus tear description. This study evaluates a simple MRI tear classification system for inter-observer agreement. Knee MRI examinations from 57 subjects from the Osteoarthritis Initiative cohort were reviewed by two sub-specialty trained, musculoskeletal radiologists. Based on two pulse sequences, each meniscus was classified by: tear or no tear; location of tear in anterior, middle or posterior third or multiple thirds; and displaced or non-displaced radial, horizontal, longitudinal or complex tear pattern. A tear was defined as signal abnormality extending to the surface on at least two images and displacement as more than 2 mm of extrusion or separation measured orthogonal to the tear plane. Kappa, weighted Kappa and percentage agreement were calculated. For the medial meniscus, Kappa and percentage agreement estimates were, respectively: the presence of tear, 0.79 and 89.5%; tear with displacement, 0.70 (weighted Kappa) and 66.0%; tear description, 0.47 and 61.4%; tear location, 0.64 and 79.0%. For the lateral meniscus, estimates were: the presence of tear, 0.75 and 89.5%; tear with displacement, 0.81 (weighted Kappa) and 86.0%; tear description, 0.56 and 78.9%; tear location, 0.74 and 87.7%. The strength of agreement between readers was moderate to substantial underscoring the challenge of meniscus tear classification.

中文翻译：

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半月板撕裂描述的可靠性：使用骨关节炎倡议的MRI研究。

尽管这是外科手术最常见的适应症之一，但应通过外科手术治疗的半月板撕裂类型的数据有限。改善患者选择要求就弯液面撕裂描述达成共识。这项研究评估了一个简单的MRI眼泪分类系统，用于观察者之间的一致性。两名骨专业放射科医生对来自骨关节炎倡议研究队列的57名受试者进行了膝部MRI检查。基于两个脉冲序列，每个弯液面按以下顺序分类：撕裂或不撕裂；眼泪的位置在前，中或后三分之一或三分之二处；以及位移或不位移的径向，水平，纵向或复杂的撕裂模式。撕裂被定义为至少在两个图像上延伸到表面的信号异常，并且在垂直于撕裂平面的方向测量到超过2 mm的挤出或分离位移。计算了Kappa，加权Kappa和百分比一致性。对于内侧半月板，卡伯值和一致性百分比估计分别为：眼泪的出现率分别为0.79和89.5％；泪液位移0.70（加权卡伯）和66.0％; 泪液描述为0.47和61.4％; 撕裂位置分别为0.64和79.0％。对于外侧半月板，估计为：撕裂的存在为0.75和89.5％；位移撕裂度为0.81（加权Kappa）和86.0％；泪痕为0.56和78.9％; 撕裂位置分别为0.74和87.7％。读者之间的共识强度是中等到显着，强调了弯液面撕裂分类的挑战。