目的探讨MRI在前置胎盘及胎盘 植入诊断中的临床价值。方法 选取在我 院就诊且经术后确诊为前置胎盘的产妇21 例，回顾性分析MRI检查对妊娠产妇前置 胎盘及胎盘植入诊断的准确性。结果 21 例患者确诊前置胎盘20例，漏诊1例，确 诊率为95.2%，合并胎盘植入15例，MRI确 诊14例，漏诊1例，确诊率为93.3%。结 论 MRI检查能任意方向成像，能够对检查 部位进行多方位多序列的观察，软组织分 辨率高，诊断的准确性高，对于前置胎盘 及胎盘植入的诊断具有较高的临床应用价 值。

Objective To evaluate the clinical value of MRI in diagnosis of placenta previa and Placental Implantation Abnormality. Methods A total of 21 cases of placenta previa with and without placental implantation abnormality confirmed by operating pathology which were examined by conventional MRI scans. To retrospectively analyze the diagnostic accuracy of MRI of the 21 cases. Results Among these 21 patients, there were 20 cases of placenta previa diagnosed by MRI and1 case missed diagnosed. The diagnostic accurate rate of placenta previa by MRI was 95.2%. While there were14 cases of placental implantation abnormalityconfirmed by MRI and1 case missed diagnosed. The diagnostic accurate rate of placental implantation abnormality by MRI was 93.3%. Conclusion MRI has high value in the diagnosis of placenta previa and placental implantation abnormality.