Dynamic magnetic resonance imaging technique for the study of the temporomandibular joint.
Dynamic magnetic resonance imaging technique for the study of the temporomandibular joint.
复制标题
用于研究颞下颌关节的动态磁共振成像技术。
作者：
Yunn;L. Gallo;D. Meier;S. Palla
旨在
回波平面成像（EPI）是一种超快磁共振成像（MRI）技术，可以在不到一秒的时间内扫描单帧。本研究的目的是使用EPI技术开发一种新的颞下颌关节（TMJ）动态MRI方案。
方法
基本的快场回波和EPI脉冲序列用于TMJ的动态研究。受试者被指示进行自发的，连续的，缓慢的打开/关闭运动，没有视觉或听觉反馈。探索不同的扫描参数设置以优化结果。
结果
通过每个周期约6 - 7秒的打开/关闭运动，所提出的方案对髁突和椎间盘之间的相对运动产生了良好的洞察。还可以看到圆盘在运动过程中的变形。
结论
EPI技术是一种非侵入性技术，可用于缓慢但连续、不间断的下颌运动的动态成像研究。
AIMS
Echo planar imaging (EPI) is an ultrafast magnetic resonance imaging (MRI) technique that can scan a single frame in less than a second. The aim of this study was to use the EPI technique to develop a new dynamic MRI protocol for the temporomandibular joint (TMJ).
METHODS
Basic fast-field echo and EPI pulse sequences were used for dynamic studies of the TMJ. The subjects were instructed to perform spontaneous, continuous, slow opening/closing movements without visual or audio feedback. Different scanning parameter settings were explored to optimize the results.
RESULTS
With an opening/closing movement of approximately 6 to 7 seconds per cycle, the proposed protocol yielded a good insight into the relative motion between condyle and disc. It was also possible to see the deformation of the disc during movement.
CONCLUSION
The EPI technique is a non-invasive technique that can be used for dynamic imaging study of a slow but continuous, uninterrupted jaw movement.