磁共振成像在胎儿泌尿系统异常诊断中的应用

目的 探讨磁共振成像（MRI）在诊断胎儿泌尿系统发育异常中的应用价值。方法 应用Philips Achieva 1.5T超导型磁共振设备，对产前超声拟诊为泌尿系统发育异常的27～38孕周的胎儿腹部进行检查，行SSh-FSE T2WI和FFE T1WI序列轴位、冠状位扫描，33例行产后超声或引产后尸检随访。分析33例胎儿泌尿系统发育异常的MRI表现，并与随访结果比较得出MRI诊断准确率。结果 33例经产前MRI诊断胎儿泌尿系统异常中，多囊性发育不良肾4例、多囊肾5例、肾发育不良3例、异位肾4例、肾缺如4例、马蹄融合肾2例、肾盂输尿管结合处异常4例、重复肾2例以及膀胱输尿管结合处异常5例。与产后超声及引产后尸检结果比较，MRI诊断正确30例，误诊3例，诊断准确率90.9%。结论 MRI在胎儿泌尿系统发育异常诊断中具有较高应用价值，可作为产前超声的重要补充检查手段。

Application of magnetic resonance imaging to prenatal diagnosis of urinary anomalies

Objective To explore the value of magnetic resonance imaging(MRI) in the diagnosis of fetal urinary abnormalities.Methods MR scanning was performed on living fetuses with gestational ages ranging 27-38 weeks,who were diagnosed as having urinary abnormalities by prenatal ultrasonography(US).Single shot(SSh) FSE T2WI and fast field echo(FFE) T1WI sequences with the Philips Achieva 1.5T MR scanner were used to obtain abdominal images on axial and coronal planes.The results of prenatal MRI of 33 cases were comp...