ABSTRACT
Objective:To investigate the diagnostic value of 1.5T magnetic resonance imaging(MRI) and multi-slice spiral CT (MSCT) for subacromial impingement syndrome(SIS).Methods: The clinical data of 60 patients with SIS were researched by using retrospective analysis. All of patients were detected by using MRI and CT, respectively. And the diagnosis value of the two methods were compared.Results: The differences of sensitivity and Youden index between MRI and MSCT were significant, respectively (x2=12.987,x2=12.987,P<0.05), and the diagnostic sensitivity of MRI was higher than that of MSCT. While the diagnostic specificities of the two method were 100％. The differences of detectable rate for Bigliani I and Bigliani II between MRI and MSCT were no significant (x2=2.492,x2=2.031, P>0.05), respectively. The detectable rate of MRI for Bigliani III was significantly higher than that of MSCT (x2=9.087, P<0.05).Conclusion: The diagnostic sensitivity of MRI for SIS is higher than that of MSCT, and the main reason is that MRI has higher resolution ratio for soft tissue. Besides, it has no radiation. Therefore, it is appropriate to the diagnosis of SIS.