The value of magnetic resonance in the shoulder joint due to trauma compared with surgery 4.4.1 Evaluate appropriateness in diagnosis of MRI and surgery in the diagnosis of rotator cuff lesions Table 3.35 shows the sensitivity, specificity, accuracy, positive predictive value, negative predictive value of MRI in the evaluation of rotated apical lesions respectively 100%; 85.7%; 95.9%; 94.5% and 100%.