Changes in T(2)-weighted MRI of supinator muscle, pronator teres muscle, and extensor indicis muscle with manual muscle testing.
Changes in T(2)-weighted MRI of supinator muscle, pronator teres muscle, and extensor indicis muscle with manual muscle testing.
复制标题
DOI：
10.1589/jpts.29.409
复制
发表时间：
2017-03
影响因子：
--
通讯作者：
Seo Y
中科院分区：
文献类型：
--
作者：
Yoshida K;Akiyama S;Takamori M;Otsuka D Eng H;Seo Y
[目的]为了通过手动肌肉测试来检测肌肉活动，使用0.2T紧凑型磁共振系统对T2加权磁共振(T2w-MR)图像进行检测。[研究对象与方法]受试者为成年男性3例。测量左前臂横断T2加权多层自旋回波图像，回波时间39 ms，重复时间2,000 ms，层厚9.5 mm，累积1次，总图像采集时间4 min 16 S。然后，对旋后肌、旋前圆肌或食指伸肌进行手法等长收缩运动(持续5s)，采用Borg的RPE评分(15~17)。运动后即刻测量T2w-MR图像。[结果]运动后旋后肌、旋前圆肌、食指伸肌的T2W-MR图像强度明显增加。然而，肌肉其余部分的图像强度没有变化。[结论]利用T2W-MR图像，可以检测到深肌旋后肌和小肌食指伸肌的肌肉活动。这些结果也支持了人工肌肉测试方法的可靠性。
[Purpose] In order to detect muscle activity with manual muscle testing, T2-weighted magnetic resonance (T2w-MR) images were detected by a 0.2 T compact MRI system. [Subjects and Methods] The subjects were 3 adult males. Transverse T2-weighted multi-slice spin-echo images of the left forearm were measured by a 39 ms echo-time with a 2,000 ms repetition time, a 9.5 mm slice thickness, 1 accumulation and a total image acquisition time of 4 min 16 s. First, T2w-MR images in the resting condition were measured. Then, manipulative isometric contraction exercise (5 sec duration) to the supinator muscle, the pronator teres muscle or the extensor indicis muscle was performed using Borg’s rating of perceived exertion (RPE) scale of 15–17. The T2w-MR images were measured immediately after the exercise. [Results] T2w-MR image intensities increased significantly in the supinator muscle, the pronator teres muscle and the extensor indicis muscle after the exercise. However, the image intensities in the rest of the muscle did not change. [Conclusion] Using T2w-MR images, we could detect muscle activity in a deep muscle, the supinator muscle, and a small muscle, the extensor indicis muscle. These results also support the reliability of the manual muscle testing method.