SHOULDER
Joint injection is a proven procedure for the diagnosis and treatment of several shoulder diseases and nowadays is the preferred imaging technique for the investigation of patients with shoulder instability.32
Intra-articular administration of contrast media for direct MR arthrography allows better visualization of the labroligamentous complex and the capsule.33 In fact, extension of contrast medium into the joint permits separation of the structures, depicts subtle lesions of the labroligamentous complex, and improves accuracy in diagnosis of full-thickness and partial-thickness articular surface tears.34 MR arthrography also distinguishes tears from postoperative granulation tissue, a very difficult discrimination with conventional MR imaging.35