老年患者体内金属置入物3T MRI检查的安全性探讨

Safety of elderly patients with metal implants in 3T MRI examination

目的 回顾性分析金属置入物的老年患者接受3T MRI检查的安全性,并评估其图像质量.方法 345例金属置人物的老年患者接受3T MRI检查,置人物为非铁磁性或弱磁性金属.观察检查前和检查后即刻、1W 患者生命体征和不适症状,并评估图像质量.结果 所有患者均未出现由检查引发的不良反应,3个时间段观测的患者生理指标稳定,组间差异无统计学意义（P〉0.05）.图像符合诊断要求.结论非铁磁性或弱磁性的体内金属置入物患者接受3T MRI检查安全可行,未明显影响图像诊断效果.

Objective To validate the safety of metal implants in 3T MRI examination in patients via the cases follow- up and observation and to assess the image quality. Methods 345 elderly cases with medical metal implants were included in the study. Physical indexes and body complaints （if any） were recorded in three phase： before, soon after and 1 week after the MRI examination. Image quality and statistical analysis were performed. Results No side effect from the MRI examination was recorded. Physical indexes of patients obtained in the three phases were stabilized and showed no statistical difference between groups （P〉 0.05）. Image quality satisfied diagnostic requirement. Conclusions 3T MRI examination in the patients with metal implants is safe on condition that the implants are non-ferromagnetic or weakly ferromagnetic. Images quality are not obviously influenced for diagnosis.