近端胫腓关节倾斜角的X线与MRI测量对比△

Comparison of X-ray and MRI measured fibular inclination angles of the proximal tibiofibular joint

摘要:

[目的] 探讨重建膝关节磁共振 （magnetic resonance imaging, MRI） 图像测量近端胫腓关节 （proximal tibiofibular joint, PTFJ） 倾斜角的可行性与可靠性。[方法] 共 35 例内侧间室 OA 患者 （35 膝） 纳入本研究，行 MRI 测量腓骨倾斜角 （MRI measured fibular inclination angle, M-FIA） 和 X 线测量腓骨倾斜角 （X-ray measured fibular inclination angle, X-FIA） 测量， 评估 M-FIA 的信度，以及 M-FIA 与 X-FIA 之间的差异，采用 Bland-Altmann 分析法评估两者的一致性。[结果]M-FIA 测量的观察者内与观察者间组内相关系数（intraclass correlation coefficient, ICC）分别为 0.97 和 0.90，为一致性优异信度优异。X-FIA 和 M-FIA 两种测量方法的测量值间差异无统计学意义 [(26.9±7.6)° vs (26.6±7.5)°, P=0.244]。M-FIA 与 X-FIA 的 95%一致性界限为 (-0.3±2.8)°。[结论]重建膝关节 MRI 图像来测量 PTFJ 倾斜角是可重复的技术。M-FIA 与 X-FIA 可以相互替代。

Abstract:

[Objective] To investigate the feasibility and reliability of fibular inclination angles of proximal tibiofibular joint (PTFJ) mea- sured by magnetic resonance imaging (MRI) reconstruction of the knee. [Methods] A total of 35 patients (35 knees) with medial knee osteoar- thritis were included in this study. The MRI measured fibular inclination angle (M-FIA) and X-ray measured fibular inclination angle (XFIA) were conducted to present the inclination of PTFJ. The reliability of M-FIA and the differences between M-FIA and X-FIA were evalu- ated, and the consistency of the two measures was assessed by Bland-Altmann analysis. [Results] The intraclass correlation coefficient (ICC) of intra-observer and inter-observer reliability measured by M-FIA were of 0.97 and 0.90, respectively, indicating excellent consistency re- liability. There was no significant difference between the measured values of X-FIA and M-FIA [(26.9±7.6)° vs (26.6±7.5)°, P=0.244]. In term of Bland-Altmann analysis, the 95% agreement limit between M-FIA and X-FIA was of (-0.3±2.8)°. [Conclusion] The knee MRI re- construction used to measure PTFJ inclination is a reproducible technique. M-FIA and X-FIA can be substituted for each other.