Methods During abduction, used an open MRI system to image the shoulders of 10 healthy volunteers and 10 patients with impingement syndrome, with and without activation of the shoulder muscles.

• 方法用开放MRI对10例健康受试者和10例肩峰撞击症患者在臂外展过程中，有或无肩部肌肉参与下进行肩部成像。