Abstract
Research question: Short volumetric interpolated breath hold exam (VIBE) 3D gradient echo sequences are comparable to T1 spin echo (SE) sequences for evaluating the shoulder labrum using arthroscopy as a gold standard. Methods: 24 patients with suspected labral tears had magnetic resonance (MR) arthrography of the shoulder using 1.5T MR scanner. Coronal oblique 3D VIBE FS sequences were performed and reconstructed in axial and sagittal oblique planes and compared with standard T1 SE sequences. Presence and location of labral tear and rotator cuff tears were noted. Findings were correlated with surgery where available. Time to obtain T1 SE sequences versus 3D VIBE acquisition was recorded. Results: Of 24 patients, 54% had arthroscopy. Sensitivity and positive predictive value (PPV) of both T1 SE and VIBE sequences for labral tears was 92%. 100% agreement for diagnosis of labral tear by readers between both sequences was noted. Specific labral tear location was accurate in 75% for both sequences. The mean time to obtain T1 SE sequences was 13.5 mins and 7.5 minutes for 3D VIBE sequences. Conclusion: Fast MR arthrography using 3D VIBE sequences shows excellent concordance with standard T1-FS sequence for diagnosis of labral tears. With shorter acquisition time and high diagnostic sensitivity 3D VIBE sequences maybe used as an alternative to standard sequences. Level of evidence: Level III retrospective diagnostic study.
Highlights
Magnetic resonance (MR) arthrography with intraarticular contrast is the gold standard imaging technique for evaluation of shoulder joint instability
11 MR arthrograms were performed on the right shoulders and 13 on the left shoulder
In subdividing the labrum we found that 3D volumetric interpolated breath hold exam (VIBE) sequences were more sensitive in the diagnosis of posterior and superior labral tears compared to the T1-FS sequences
Summary
Magnetic resonance (MR) arthrography with intraarticular contrast is the gold standard imaging technique for evaluation of shoulder joint instability. It is of particular importance in the evaluation of labroligamentous and cartilage abnormalities [1]. Standard shoulder magnetic resonance imaging (MRI) is limited in the evaluation of the glenoid labrum because of the lack of inherent joint distension. Direct MR arthrography results in distension of the joint capsule and improved visualisation of the normal anatomy and pathology. The most common indication for MR arthrography is joint instability and pain and the advantages are evident in the evaluation of acute pathology in young active patients
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
