内固定拆除部位出现金属伪影原因分析

目的探讨金属内固定拆除部位出现金属伪影的原因.方法收集29例内固定拆除后患者临床资料,均行X线摄片或CT、MRI影像检查.结果29例患者行X线摄片或CT平扫,在内固定拆除区域均未发现金属致密影,14例在MRI检查图像中出现少许点状金属伪影,基本上分布在内固定拆除后遗留骨道区域或周围骨痂形成区域.结论MRI检查对内固定拆除术后出现金属伪影有较高敏感性,对于金属伪影产生的原因分析有重要意义,可以避免不必要的医疗纠纷.

Objective To discuss the causes of metal artifacts in the removal of metal internal fixation.Methods The data of 29 patients after removal of internal fixation were collected and all underwent X-ray or CT and MRI imaging.Results 29 patients underwent X-ray radiography or CT plain scanning,and no metal density was found in the removal area of internal fixation.Among them,14 patients showed a few spot-like metal artifacts in the MRI image,and the remaining bone tract area was basically distributed after the removal of internal fixation.Unnecessary medical disputes can be avoided.Conclusion MRI is highly sensitive to the occurrence of metallic artifacts after the removal of internal fixation.