目的分析产后胎盘植入介入治 疗前后的磁共振成像(MRI)影像学特征， 并总结其临床价值。方法 回顾性分析30 例中止妊娠或产后患者临床资料，均于我 院行双侧子宫动脉化疗栓塞介入治疗术， 治疗前后1周行MRI检查，并与临床病理诊 断结果比较，分析胎盘植入介入治疗前后 MRI影像学特征。结果 MRI诊断与临床病 理诊断相关性Kappa=0.721，P=0.000；介 入治疗前MRI征象显示，子宫体积增大， 胎盘信号强度不均匀，下肌层变薄或消 失，动态增强扫描胎盘植入部分明显强 化呈“结节状”；介入治疗后MRI征象显 示，增大子宫体积基本恢复正常，植入胎 盘与宫壁融合，子宫肌层仍可观察到受侵 的异常信号改变。结论 MRI检查对产后胎 盘植入具有较高临床诊断价值，可清晰显 示胎盘植入部位及子宫肌层受侵犯情况， 可用于评价胎盘植入介入治疗的疗效。

Objective To analyze the magnetic resonance imaging (MRI) features and clinical value of postpartum placenta implantation before and after interventional therapy. Methods The clinical data of 30 patients with interruption of pregnancy or delivery hospitalized in our hospital were analyzed retrospectively. All patients were given bilateral uterine artery chemoembolization interventional therapy. MRI was performed at 1 week before and after treatment, and MRI results were compared with the clinicopathological diagnosis results, and the MRI features postpartum placenta implantation before and after interventional therapy were analyzed. Results The correlation between MRI diagnosis of postpartum placenta implantation and clinical pathological diagnosis showed Kappa=0.721, P= 0.000, and the difference was statistically significant. The MRI findings before interventional therapy showed that there were increased uterine volume, uneven signal intensity of placenta and the thinned or disappeared lower muscle layer, dynamic enhanced scanning showed that the placenta implantation was partially enhanced with nodular appearance. MRI findings after interventional therapy showed that the increased uterus volume was recovered to normal, and the implanted placenta was fused with the uterine wall, and the anomalous signal of invasion could still be observed in the myometrium. Conclusion MRI examination has high clinical diagnostic value in postpartum placenta implantation. It can clearly show the location of placenta implantation and the invasion of uterine myometrium, and can be used to evaluate the effect of interventional therapy for placenta implantation.