Original articleAcromial shapes and extension of rotator cuff tears: Magnetic resonance imaging evaluation
Section snippets
Study 1
There were 91 patients with complete RCT (mean age, 62.5 years; range, 26-92 years). The diagnosis of RCT was based on the results of surgery, arthrography, or MRI studies. All cases were studied at 0.5 T (Gyroscan T5II; Philips medical systems, Best, The Netherlands). To determine the size of the RCT in 91 shoulders, we measured its largest extent in the coronal plane along the long-axis of the supraspinatus tendon and in the sagittal oblique plane on T2-weighted images (TR 2400 ms, TE 85 ms).
Study 1
Three distinct acromial shapes were identified by this study as shown in Figure 2.These images demonstrated the real acromial shape as high-signal intensity without subacromial spurs. We demonstrated that, in 91 shoulders with complete RCT, the acromial shapes of 33 shoulders were type I (36.3%), 22 type II (24.2%), and 36 type III (39.5%). As shown in Table I,
Discussion
Our goal was to clarify the relationship between acromial shape and RCT. Therefore, we selected T2-weighted MRI to classify the shapes, which were evaluated from the sagittal oblique plane. These images demonstrated the real acromial shape as high-signal intensity without subacromial spurs. As the images obtained just lateral to the acromioclavicular joint consistently demonstrated the longest dimension of the acromion, these were selected to define the acromial shape.
Bigliani et al1 showed a
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2015, Journal of Shoulder and Elbow SurgeryCitation Excerpt :In addition, the MRIs were reviewed twice by an orthopedic shoulder surgeon at different times, and the intraclass correlation was almost perfect (P = .91-.98). In our previous work,14 the diagnostic sensitivity, specificity, and accuracy for full-thickness RCTs on preoperative MRI scans were 100%, 76.9%, and 89.2%, respectively. Table II reports the results of the arthroscopic findings and the different procedures.