Brady A P, McDevitt L, Stack J P, Downey D
Institute of Radiological Sciences, Mater Hospital, Ireland.
Clin Radiol. 1993 Feb;47(2):127-33. doi: 10.1016/s0009-9260(05)81189-4.
T1-weighted Magnetic Resonance Imaging (MRI) of 72 temporomandibular joints (TMJs) of symptomatic patients and normal subjects was performed after they had been clinically classified. The images were then interpreted by two radiologists, blinded to the clinical classification. The technique of imaging used a head coil for bilateral imaging, allowing a 3-position study in under 1 h. Correlation between MRI and clinical classification at the level of normal vs abnormal was achieved in 61/72 joints, giving a sensitivity of 79% and a specificity of 91% for MRI relative to the clinical assessment. True coronal images were of no added value. The addition of supplemental gradient-echo images was helpful in 12/15 joints. Osseous condylar abnormalities were present in 15 joints, all of which had otherwise identifiable disc abnormalities. Diminished condylar translation was a useful indirect sign of non-reducing disc displacement. We conclude that MRI is a very useful and reliable technique in TMJ imaging. The technique described is applicable to any MR unit, without the need for dedicated coils.
对有症状患者和正常受试者的72个颞下颌关节（TMJ）进行临床分类后，进行了T1加权磁共振成像（MRI）检查。然后由两位对临床分类不知情的放射科医生解读图像。成像技术使用头部线圈进行双侧成像，可在1小时内完成三个位置的研究。在72个关节中，有61个关节实现了MRI与正常与异常水平的临床分类之间的相关性，相对于临床评估，MRI的敏感性为79%，特异性为91%。真正的冠状位图像没有附加价值。在15个关节中，补充梯度回波图像有帮助的有12个。15个关节存在髁突骨质异常，所有这些关节都有其他可识别的盘状异常。髁突平移减少是盘状移位未复位的一个有用间接征象。我们得出结论，MRI是TMJ成像中一种非常有用且可靠的技术。所描述的技术适用于任何MR设备，无需专用线圈。
