摘要:目的探讨MRI诊断胎儿脊柱脊髓畸形的价值及序列选择。方法回顾性分析产前超声疑诊胎儿脊柱脊髓异常且48 h内接受MR针对性脊柱检查(Haste、Trufi和SWI)的30胎,分别与产后(生产或引产)6个月内随访结果(影像学、手术或尸检)对照,分析MRI与超声诊断符合率及MR针对不同病变的序列选择。结果7胎无畸形,15胎椎体畸形(裂椎、半椎体、分隔不全、骶尾椎发育不全),5胎脊髓低位,3胎脊柱裂、脊髓脊膜膨出,4胎脊柱、脊髓复合畸形。产前MRI诊断与随访结果完全一致;产前超声漏诊椎体畸形2胎,脊髓低位4胎,脊膜膨出、脊髓空洞及纵裂各1胎。Haste、Trufi序列可较好地显示脊柱、脊髓结构和畸形,而SWI能清晰显示椎体结构和畸形。结论MR Haste及Trufi序列显示胎儿脊髓及椎管内异常准确性较高,而SWI对显示椎体畸形有独特价值。
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