ABSTRACT
Because they distend the shoulder joint and bathe the labrum with contrast, CT arthrography
(CTa) and MR arthrography (MRA) are both excellent tests for evaluating the labrum.
In this article, we discuss the advantages and disadvantages of each examination.
We also describe techniques for performing CTa and MRA, including how to maximize
image quality. The normal anatomy of the labrum and glenohumeral ligaments is described
and demonstrated on both CTa and MRA images. To improve communication with orthopedic
surgeons, the discussion of the pathology and normal variants of the labroligamentous
complex is organized by functional anatomic regions. CTa and MRA images are then used
to demonstrate a variety of pathologic and normal variant appearances of the labroligamentous
complex.
KEYWORDS
Arthrography - magnetic resonance imaging - shoulder
