Demonstrates excellent reliability and validity of ultrasound in assessing rotator cuff muscles, suggesting its practical use for monitoring changes.
US CSA measures of the supraspinatus and infraspinatus muscles demonstrated excellent criterion validity and same-day and between-day intrarater reliability. These findings support the use of US as a practical, accessible tool for monitoring rotator cuff muscle size and detecting clinically meaningful changes over time.
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Kokmeyer et al. (2026) studied this question.
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