关键词: 铅球运动, 冈上肌肌腱损伤, MRI, 脂肪分数, 损伤程度

Abstract: This study explored the value of MRI quantitatively in determining the injury of the supraspinatus tendon in shot putters. 82 cases of shot putters with supraspinatus tendon injury were selected as the research objects. All of them underwent MRI examination. They were divided into degeneration group (n=35), partial tear group (n=27), and complete-tear group (n=20) according to the degree of tendon tear severity (TTS), and another 25 healthy shot putters during the same period were selected as the control group. The results showed that, comparing the fat fraction (FF), complete tear group>partial tear group>degeneration group>control group; comparing the relative size of supraspinatus muscle, complete tear group < partial tear group < degeneration groupP<0.05). The TTS of supraspinatus was positively correlated with FF, and negatively correlated with relative size of supraspinatus (P<0.05); the area under the curve (AUC) of FF and relative size of supraspinatus for diagnosing supraspinatus tendon tear were 0.846 and 0.836, respectively, and the AUC of the combined diagnosis was the largest, which was 0.867; the FF of patient was lower at 6 months after treatment than before, the relative size of the supraspinatus, the University of California shoulder score (UCLA), and the subjective shoulder score (SSV) scores were higher than those before treatment (P<0.05); the relative size of ΔFF and Δsupraspinatus was positively correlated with ΔUCLA and ΔSSV (P<0.05). The MRI quantitative index FF and the relative size of the supraspinatus have good value in judging the injury of the supraspinatus tendon in shot put players.

Key words: shot put, supraspinatus tendon injury, MRI, fat score, injury degree