上臂抬高过程中的盂-肱在体运动模式分析

Motion pattern analysis of the humerus and glenoid structure during arm elevation

目的 利用核磁共振成像和三维图像后处理技术 ,在上臂被动抬高过程中对肩带的盂 -肱结构进行基本运动分析。方法 选用 2 0个志愿者 ,利用开放核磁共振系统对上臂 5个不同外展位置(30°、6 0°、90°、12 0°、15 0°)进行扫描。经过分层扫描采集数据后 ,实施三维重建 ,确定肱骨和关节盂平面的轴 ,并计算它们相对于参考平面之间的运动。结果 获得了上臂被动抬高过程中盂 -肱结构相对参考平面运动的特殊三维运动数据。结论 利用核磁共振成像和三维图像后处理技术可以揭示在上臂被动抬高过程中盂 -肱关节相对参考系运动的特殊三维运动模式 ;

Objective To develop a motion analysis of glenoid and humerus structures during passive arm elevation with open magnetic resonance imaging and three dimensional image processing. Methods Twenty volunteers were enrolled, the arms were scanned in 5 positions of abduction (30°,60°,90°,120°,150°) with an open magnetic resonance system. After the segmentation and three dimensional reconstruction, the axis of humerus and plane of the glenoid were determined, and the movements relative to reference system were calculated. Results The specific three dimensional motion patterns for glenohumeral joint were obtained. Conclusion Taking advantage of open magnetic resonance imaging and the skill of three dimensional image processing, specific three dimensional motion patterns relative to reference system of glenohumeral joint during passive elevation can be revealed. The technique applied and results obtained in this study can be used to make further studies of patients with pathologic changes of shoulder girdle motion.