Description
The aim of this study was to determine the comparative accuracy and precision of routine Magnetic Resonance Imaging versus MR arthrogram in measuring labral tear size as a function of time from a shoulder dislocation. We hypothesized that MRI would demonstrate a time-dependent loss of accuracy and precision in determining tear extent, with a threshold at which point the value of MRI arthrogram would exceed that of an MRI, and that MR arthrogram would not demonstrate time-dependence. We found that compared to MR Arthrogram, conventional MRI demonstrates time-dependent loss of accuracy and precision in determining shoulder labral tear extent following dislocation, with statistical divergence occurring at 2 weeks.
