Friedman R J, Bonutti P M, Genez B
Department of Orthopedic Surgery, Medical University of South Carolina, Charleston 29425, USA.
Orthopedics. 1998 May;21(5):545-8.
Cine magnetic resonance imaging (MRI) was used to define the normal space between the humeral head and coracoid process, known as the subcoracoid space, to quantify the subcoracoid space in symptomatic patients and identify the anatomic structures responsible for narrowing of this space. The study population was comprised of 50 normal volunteers and 75 patients with shoulder pain. All subjects underwent cine MRI of the shoulder using a shoulder-rotating device that allows progressive rotation of the glenohumeral joint in 10 degrees increments from internal to external rotation while scanning the shoulder in the axial plane. In asymptomatic patients, the normal interval between the lesser tuberosity and coracoid process (coracohumeral distance) averaged 11 mm in maximum internal rotation. In symptomatic patients, impingement or entrapment of the subscapularis tendon and other soft-tissue structures between the lesser tuberosity and the coracoid process in internal rotation was identified, and the mean distance between the lesser tuberosity and coracoid process measured 5.5 mm in maximum internal rotation. This new MRI technique for shoulder imaging is safe, easy to perform, noninvasive, and well-tolerated by patients. Cine MRI provides valuable information on the subcoracoid region not obtainable with other methods.
电影磁共振成像（MRI）用于确定肱骨头与喙突之间的正常间隙，即喙突下间隙，以量化有症状患者的喙突下间隙，并确定导致该间隙变窄的解剖结构。研究人群包括50名正常志愿者和75名肩部疼痛患者。所有受试者均使用肩部旋转装置进行肩部电影MRI检查，该装置可使盂肱关节从内旋到外旋以10度增量逐步旋转，同时在轴向平面扫描肩部。在无症状患者中，小转子与喙突之间的正常间距（喙肱距离）在最大内旋时平均为11毫米。在有症状患者中，发现内旋时小转子与喙突之间的肩胛下肌腱和其他软组织结构受到撞击或卡压，小转子与喙突之间的平均距离在最大内旋时为5.5毫米。这种用于肩部成像的新MRI技术安全、易于操作、无创且患者耐受性良好。电影MRI提供了其他方法无法获得的关于喙突下区域的有价值信息。
