Diagnostic Value of Low-Field MRI System in Rotator Cuff Injuries

Objective To evaluate the diagnostic value of low-field MR system in the lesions of rotator cuff and glenoid labrum.Methods Fifty-two patients with shoulder impingement syndromes or suspected rotator cuff injury from Nov.2002 to Aug.2009 were selected,and 0.23 t MRI was performed in all cases before operation.Referred to the diagnostic results of arthroscopic or the findings of surgery,the sensitivity,specificity,accuracy and positive predictive of MRI were calculated.Results The surgical findings revealed rotator cuff tears in 44 patients and labral lesions in 11 patients.Among the rotator cuff tears,the sensitivity,specificity,accuracy and positive predictive value of MRI were 95%,88%,94% and 98%,respectively.For the labral lesions,the sensitivity,specificity,accuracy and positive predictive value were 75%,95%,90% and 82%,respectively.Conclusion There was a good agreement between the results of low-field MR system and surgical findings for the lesions of the rotator cuff and glenoid labrum.