Skeletal muscle coutraction : visualization with Ultra-fast tagging MR2

骨骼肌收缩：超快速标记MRI的可视化这项研究证明了使用新开发的标记MRI的骨骼肌收缩的定量可视化，其采集时间小于2秒。该方法是基于T1加权磁化准备梯度回波成像。结合空间选择性RF标记脉冲，该序列允许标记和跟踪肌肉动作，而无需门控采集。在体模检查后，对人类志愿者进行了下肢各种肌肉有意收缩的研究。在形态学变化中，特别是股四头肌，肌腹的收缩方式和通过筋膜和肌腱的收缩力表现为明亮标记条纹的移位和改变。

Skeletal Muscle Contraction : Visualization with Ultra-fast Tagging MRIThis study demonstrates quantitative visualization of the skeletal muscle contraction using a newly-developed tagging MRI with acquisition times of less than 2 seconds. The method is based on T1-weighted magnetization-prepared gradient echo imaging. Combining spatially selective RF tagging pulses, this sequence allows labeling and tracking of muscular action without the need for gated acquisition. After phantom examinations, human volunteer studies were performed with intentional contractions of various muscles at the lower-extremity. Among morphological variations, especially for the quadriceps muscle, contractile fashion of muscle "bellies" and contraction forces via fascia and tendon were demonstrated as displacement and alteration of the bright tagging stripes.