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首页> 外文期刊>Skeletal radiology >MR accuracy and arthroscopic incidence of meniscal radial tears.
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MR accuracy and arthroscopic incidence of meniscal radial tears.

机译：MR准确性和半月板放射状眼泪的关节镜检查发生率。

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OBJECTIVE. A meniscal radial tear is a vertical tear that involves the inner meniscal margin. The tear is most frequent in the middle third of the lateral meniscus and may extend outward in any direction. We report (1) the arthroscopic incidence of radial tears, (2) MR signs that aid in the detection of radial tears and (3) our prospective accuracy in detection of radial tears. DESIGN AND PATIENTS. Three musculoskeletal radiologists prospectively read 200 consecutive MR examinations of the knee that went on to arthroscopy by one orthopedic surgeon. MR images were assessed for location and MR characteristics of radial tears. MR criteria used for diagnosis of a radial tear were those outlined by Tuckman et al.: truncation, abnormal morphology and/or lack of continuity or absence of the meniscus on one or more MR images. An additional criterion used was abnormal increased signal in that area on fat-saturated proton density or T2-weighted coronal and sagittal images. Prospective MR readings were correlated with the arthroscopic findings. RESULTS. Of the 200 consecutive knee arthroscopies, 28 patients had radial tears reported arthroscopically (14% incidence). MR readings prospectively demonstrated 19 of the 28 radial tears (68% sensitivity) when the criteria for diagnosis of a radial tear were truncation or abnormal morphology of the meniscus. With the use of the additional criterion of increased signal in the area of abnormal morphology on fat-saturated T2-weighted or proton density weighted sequences, the prospective sensitivity was 25 of 28 radial tears (89% sensitivity). There were no radial tears described in MR reports that were not demonstrated on arthroscopy (i.e., there were no false positive MR readings of radial tears in these 200 patients). CONCLUSIONS. Radial tears are commonly seen at arthroscopy. There was a 14% incidence in this series of 200 patients who underwent arthroscopy. Prospective detection of radial tears was 68% as compared with arthroscopy when the criteria as outlined by Tuckman et al. were used alone. With the use of the additional criterion of increased signal in the area of abnormal morphology on fat-saturated T2-weighted and proton density weighted sequences, the prospective sensitivity for radial tear detection as compared with arthroscopy was 89% in our series. Fat-saturated proton density and T2-weighted images greatly improve the detection of radial tears as signal intensity changes in radial tears as well as morphologic changes can be utilized for the detection of subtle tears.
机译：目的。半月板放射状撕裂是涉及内部半月板边缘的垂直撕裂。撕裂最常见于外侧半月板的中部，并且可以在任何方向向外延伸。我们报告（1）关节镜下放射状撕裂的发生率，（2）MR征兆有助于检测放射状撕裂，以及（3）我们在放射状撕裂检测中的预期准确性。设计和患者。三名肌肉骨骼放射科医生前瞻性地读取了200名连续的MR膝关节检查，并由一名骨科医生进行了关节镜检查。评估了MR图像的径向撕裂的位置和MR特征。 Tuckman等人概述了用于诊断radial骨撕裂的MR标准：在一个或多个MR图像上，截断，异常形态和/或弯液面不连续或不存在弯月面。使用的另一个标准是在该区域的脂肪饱和质子密度或T2加权冠状和矢状图像上异常增加的信号。预期的MR读数与关节镜检查结果相关。结果。在200例连续的膝关节镜检查中，有28例经关节镜检查发现有radial裂（发生率为14％）。当诊断tear骨撕裂的标准是截断或半月板形态异常时，MR读数可以前瞻性地显示28个radial骨撕裂中的19个（敏感性为68％）。在脂肪饱和的T2加权或质子密度加权序列上使用异常形态区域中信号增加的附加判据，前瞻性敏感性为28颗放射状泪液中的25颗（89％敏感性）。在MR报告中没有描述关节镜下未显示的radial骨撕裂（即，这200例患者中false骨撕裂没有MR假阳性读数）。结论。放射状眼泪在关节镜检查中很常见。在这200例接受关节镜检查的患者中，这一比例为14％。当符合Tuckman等人的标准时，与关节镜检查相比，放射状泪液的预期检出率为68％。被单独使用。在脂肪饱和T2加权和质子密度加权序列上使用异常形态区域中信号增加的附加判据，与关节镜相比，放射状泪液检测的预期敏感性为89％。脂肪饱和的质子密度和T2加权图像极大地改善了放射状泪液的检测，因为放射状泪液的信号强度变化以及形态学变化可用于检测细微的泪液。

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