Quemar J C, Akoka S, Romdane H, de Certaines J D
Laboratory of Magnetic Resonance Imaging in Biology and Medicine, Faculty of Medicine, University of Rennes, Tours, France.
Dentomaxillofac Radiol. 1993 May;22(2):61-8. doi: 10.1259/dmfr.22.2.8375556.
A pseudo-cinematic magnetic resonance imaging study of the temporomandibular joint (TMJ) was undertaken with the aim of reconciling image quality with the shortest possible examination time. Two receivers were compared, a surface coil and a circularly polarized head coil, and the latter was found to be superior. Using a gradient echo sequence, repetition time and flip angle were optimized by visual assessment of the images and by measuring the contrast-to-noise ratio. A mechanical device was used to control opening and closing. The technique has been used on a series of 75 subjects, 60 of whom had TMJ dysfunction. Total acquisition time was 7 min. The results confirmed that it is possible to obtain pseudo-cinematic TMJ images suitable for clinical diagnosis by optimizing the choice of receiver and capture parameters.
为了在尽可能短的检查时间内兼顾图像质量，开展了一项颞下颌关节（TMJ）的伪电影磁共振成像研究。对两种接收器进行了比较，即表面线圈和圆极化头部线圈，结果发现后者更具优势。使用梯度回波序列，通过对图像的视觉评估以及测量对比噪声比来优化重复时间和翻转角。使用一种机械设备来控制张口和闭口。该技术已应用于75名受试者，其中60人患有颞下颌关节功能障碍。总采集时间为7分钟。结果证实，通过优化接收器的选择和采集参数，可以获得适合临床诊断的伪电影颞下颌关节图像。
