Objective To compare the results of CT-assisted double-contrastarthrography and MRI in the diagnosis of adhesion of TMJ.
目的比较颞下颌关节盘粘连的磁共振（MRI）和CT双对比造影结果，探讨它们在关节盘粘连中的诊断价值。
2
Purpose: To study clinical importance of double contrast CT arthrography in the diagnosis of shoulder instability.
目的：探讨CT空气-碘水双对比造影对诊断肩关节不稳定的临床意义。
3
Objective to study the feasibility of MR arthrography of knee joint by using intravenous injection of MR contrast agent which disperses into the knee joint, to optimize the scanning parameters.