Totterman S M, Miller R J, Meyers S P
Department of Radiology, University of Rochester Medical Center, New York 14642-8694.
Top Magn Reson Imaging. 1994 Spring;6(2):86-93.
An understanding of the normal magnetic resonance (MR) infrastructural details of musculotendinous elements of the rotator cuff forms the basis for analysis of its pathology. The muscular bellies of the teres minor, infraspinatus, supraspinatus, and subscapularis are easily identified in MR images. In their lateral course both the supraspinatus and infraspinatus muscles transition to tendons gradually. Their lateral tendinous portions partially overlap and form a layered appearance on MR images. The subscapularis, with its fan-like tendinous insertional slips at the lesser tuberosity, can be identified easily in all imaging planes. The ligamentous structures of the shoulder, including the coracoacromial and coracohumeral ligaments, are visualized as low signal bands in all imaging planes. The capsuloligamentous structures including the superior, middle, and inferior glenohumeral ligament and glenoid labrum present considerable anatomic variations. This is especially true with respect to the anterior labrum, which varies from absent to a well-formed triangular appearance. Understanding the basic MRI anatomy of all soft tissue structures of the shoulder is essential for appropriate interpretation of lesions related to the shoulder.
了解肩袖肌肌腱结构的正常磁共振（MR）基础细节是分析其病理的基础。在MR图像中很容易识别小圆肌、冈下肌、冈上肌和肩胛下肌的肌腹。在其外侧走行中，冈上肌和冈下肌都逐渐过渡为肌腱。它们的外侧肌腱部分部分重叠，在MR图像上形成分层外观。肩胛下肌在小结节处有扇形肌腱插入支，在所有成像平面上都很容易识别。肩部的韧带结构，包括喙肩韧带和喙肱韧带，在所有成像平面上均显示为低信号带。包括上、中、下盂肱韧带和盂唇在内的关节囊韧带结构存在相当大的解剖变异。前盂唇尤其如此，其形态从缺如到形态良好的三角形各不相同。了解肩部所有软组织结构的基本MRI解剖对于正确解读与肩部相关的病变至关重要。
