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[Diagnostic value of arthrography and MRI in rotator cuff tears]
1Department of Orthopaedic Surgery, Beijing Friendship Hospital, Beijing 100050, China.
Objective:
To prospectively compare arthrography with MRI to determine the sensitivity and specificity in detecting rotator cuff tear.
Methods:
53 shoulders were studied. All patients underwent both arthrography and MRI. The results were compared with the findings of arthroscopy or open surgery.
Results:
The sensitivity in demonstrating partial-thickness tears was 70% for arthrography and 80% for MRI; the specificity was 75% for arthrography or MRI. The sensitivity in detecting full-thickness tears was 87% for arthrography and 90% for MRI, and the specificity was 100% for arthrography and 75% for MRI.
Conclusion:
The sensitivity of arthrography and MRI in detecting rotator cuff tears was identical. The specificity of arthrography in detecting full-thickness tears was higher that of MRI.