3D-CT and 3D-MRI in diagnosis of shoulder joint glenoid defect / 中国医学影像技术

ABSTRACT

Objective: To compare the value of three dimensional CT (3D-CT) and three-dimensional MRI (3D-MRI) in diagnosing shoulder glenoid bone loss (GBL). Methods: Totally 50 patients with shoulder instability (SI) underwent 3D-CT and 3D-MR examinations. Glenoid surface area, GBL surface area and degree of GBL measured with 3D-CT and 3D-MRI were comparatively analyzed. Digital calipers was used to measure GBL of all patients during operation, and the data were analyzed with Kappa test to observe diagnostic performance of 3D-CT and 3D-MRI. Results: The best fitting circle surface area with 3D-CT was larger than that with 3D-MRI, but there was no significant difference (P>0.05). There was no significant difference of GBL surface area nor degree of GBL acquired using two Methods: (both P>0.05). According to linear regression analysis, the regression coefficient of the best fitting circular surface area was 1.06 (R2=0.78) between 3D-CT and 3D-MRI, of GBL surface area was 1.05 (R2=0.88). GBL degree measured with 3D-CT and 3D-MRI was in good agreement with intraoperative measurement Results: (Kappa=0.82, P<0.05; Kappa=0.88, P<0.05). Conclusion: 3D-CT and 3D-MRI have the same value in diagnosis of shoulder GBL. 3D-MRI has the potential to take place of 3D-CT for providing full and non-radiative pre-operative evaluation of GBL in SI patients.