Quantitative magnetic resonance imaging vs. perioperative arthroscopy to measure stage 1 ruptures of the supraspinatus tendon for surgical planning.

There was good concordance between STT size measured by qMRI and that measured perioperatively by arthroscopy. However, preoperative STT size measured by qMRI did not concur with the surgical plan in 15% of patients and in these patients the surgical procedure had to be revised during surgery.