Abstract:Objective To analyze the application effects of 3.0T magnetic resonance imaging (MRI) and 64-slice spiral computed tomography (CT) in the diagnosis of shoulder joint injuries.Methods A total of 122 patients with suspected shoulder joint injuries who visited the 903rd Hospital of the Joint Logistic Support Force of the People's Liberation Army of China from November 2023 to December 2024 were selected. The findings of arthroscopy were taken as the gold standard to analyze the diagnostic results of patients with suspected shoulder joint injuries. The 3.0T MRI and 64-slice spiral CT scans were performed on all the patients. The diagnostic efficacy of 3.0T MRI and 64-slice spiral CT scans for shoulder joint injuries and their diagnostic accuracy for different conditions of shoulder joint injuries were compared.Results Among 122 patients with suspected shoulder joint injuries, arthroscopy was used as the gold standard, confirming shoulder joint injuries in 116 cases (95.08%). The specific diagnoses included 76 cases of rotator cuff injuries, 32 cases of labral injuries, 13 cases of subacromial impingement syndrome, 4 cases of adhesive capsulitis, and 2 cases of long head of the biceps tendon injuries. The sensitivity of 3.0T MRI in diagnosing shoulder joint injuries was 84.48% (95% CI: 0.759,0.930), with a specificity of 66.67% (95% CI: 0.582, 0.752). The sensitivity of 64-slice spiral CT in diagnosing shoulder joint injuries was 59.48% (95% CI: 0.510,0.680), with a specificity of 33.33% (95% CI: 0.248, 0.418). The diagnostic accuracy of 3.0T MRI for rotator cuff and labral injuries was higher than that of 64-slice spiral CT (P < 0.05). The diagnostic accuracy of 3.0T MRI and 64-slice spiral CT for subacromial impingement syndrome, adhesive capsulitis, and long head of the biceps tendon injuries showed no significant differences (P > 0.05). The sensitivity of 3.0T MRI in diagnosing rotator cuff injuries was 53.95% (95% CI: 0.455, 0.625), with a specificity of 76.09% (95% CI: 0.676, 0.846). The sensitivity of 64-slice spiral CT in diagnosing rotator cuff injuries was 26.32% (95% CI: 0.178, 0.348), with a specificity of 86.96% (95% CI: 0.785, 0.955). The sensitivity of 3.0T MRI in diagnosing of labral injuries was 53.95% (95% CI: 0.455, 0.625), with a specificity of 76.09% (95% CI: 0.676, 0.846). The sensitivity of 64-slice spiral CT in diagnosing labral injuries was 26.32% (95% CI: 0.178, 0.348), with a specificity of 86.96% (95% CI: 0.785, 0.955).Conclusion Both 3.0T MRI and 64-slice spiral CT demonstrate good diagnostic performance for shoulder joint injuries, but 3.0T MRI shows a superior advantage in detecting such injuries.