CT与MRI在肩锁关节脱位诊断中的应用价值对比研究OA

Objective:To elucidate the comparison of the application value of computed tomography(CT)and magnetic resonance imaging(MRI)in the diagnosis of acromioclavicular joint dislocation.Methods:The clinical data of 102 patients,evaluated for suspected acromioclavicular joint dislocation at the First Affiliated Hospital of Shihezi University from January 2020 to January 2025,were retrospectively analyzed.All patients underwent CT and MRI examinations.The widths of the acromioclavicular joint space and the coracoclavicular space of the two examination methods were measured,and the acromioclavicular index was calculated.The diagnosis of acromioclavicular ligament and coracoclavicular ligament injuries,Rockwood classification results and diagnostic efficacy of the two examination methods were compared.Results:No statistically significant differences were observed between CT and MRI in measurements of acromioclavicular joint space width[(8.54±1.76)mm vs.(8.72±1.81)mm,P=0.472],coracoclavicular space width[(15.26±2.49)mm vs.(15.50±2.63)mm,P=0.504],and acromioclavicular(1.88±0.21 vs.1.92±0.23,P=0.196)index.Similarly,Rockwood classification(Type Ⅰ:11.76％vs.7.84％,Type Ⅱ:20.59％vs.18.63％,Type Ⅲ:32.35％vs.38.24％,Type Ⅳ:6.86％vs.9.80％,Type Ⅴ:9.80％vs.14.71％,Unclassifiable:18.63％vs.10.78％,P=0.346,0.724,0.379,0.447,0.286,0.114)was concordant between the two imaging techniques(P＞0.05).MRI yielded a significantly higher number of diagnoses of acromioclavicular ligament injury(83.33％vs.71.57％,P=0.044)and coracoclavicular ligament injury(77.45％vs.63.73％,P=0.031)compared to CT.Furthermore,taking arthroscopic results as the gold standard,MRI demonstrated superior accuracy and sensitivity(95.10％and 95.79％,respectively,P=0.019)in the detection of acromioclavicular joint dislocation,exceeding the performance of CT(85.29％and 87.37％,P=0.037).Conclusion:Both methods can provide reference for clinical treatment of acromioclavicular joint dislocation,but MRI shows higher application value,with a distinct advantage over CT especially in evaluating ligament injuries.However,this study is a single-center retrospective analysis with limited sample size,which needs to be further verified by prospective and multi-center studies in the future.