MRI在凶险性前置胎盘诊断中的价值

产前诊断凶险性前置胎盘的关键是明确是否伴有胎盘植入。胎盘植入是指妊娠进展的过程中,当子宫蜕膜发育不良而绒毛外滋养细胞未停止侵入,胎盘绒毛直接附着到子宫肌层或深入到子宫肌层甚至达到或穿透浆膜层。磁共振成像(MRI)具有较高的空间分辨率和组织分辨率,可准确识别有无胎盘植入并评估植入深度、部位及范围,也已成为产前评估胎盘植入的重要补充方法。

Magnetic resonance imaging in the evaluation of pernicious placenta previa

Confirmation of pernicious placenta previa with or without placental accreta is crucial for the prenatal diagnosis. Placental accreta will occur when deficient development of the decidua results in abnormal attachment of the placenta to myometrium without invasion of the muscle, invasion into the deep myometrium, or even accreta through the myometrium and uterine serosa. High spatial and tissue resolution ratio of MRI can accurately identify whether placental accreta occurs and evaluate the depth, size and range of accreta. Above all, MRI has been a vital complementary technique in the evaluation of placental accreta.