Ultrasonography-guided contrast media injection to shoulder joint using a posterior approach: a technique worth trying

Unltrasonography (US)-guided magnetic resonance (MR) contrast media injection can be effectively used to provide information on shoulder joint problems. A clinical trails was carried out under which the iodinated contrast media was injected posteriorly under fluoroscopic control. The anatomy at the middle level of the posterior glenohumeral joint slit was depicted by transaxial ultrasonic and MR arthrographic images. The free edge of the posterior glenoid labrum could be identified in all patients of 20 serial shoulder US examinations when the reflecting surfaces were dynamically augmented by small to-and-fro rotations of the humerus. The posterior labrum was first scanned dynamically by US and the laterial edge preferably marked to the skin. The extra-cellular posterior injection is unlikely to interfere with MR images anteriorly.