胎儿神经系统发育畸形是最常见的胎儿先天异常,超声成像是产前发现胎儿脑畸形的常用诊断方法。侧脑室作为产前超声发现脑发育畸形的敏感线索,被广泛应用于产前检查中,是超声监测胎儿脑发育异常的一个常用指标。超声检查的安全无创、经济、方便、实时成像,使之成为胎儿检查的首选方法。磁共振成像作为超声检查的有力补充,是确诊胎儿脑发育畸形的最终手段。 Fetal nervous system deformity is the most common congenital anomaly of the fetus. Ultrasound imaging is a common diagnostic method for prenatal fetal brain deformity. The lateral cerebral ventricle, as a sensitive clue to detect brain developmental deformities in prenatal ultrasound, is widely used in prenatal examination and is a common indicator of fetal brain abnormalities monitored by ultrasound. The safety of ultrasound is non-invasive, economical, convenient and real-time imaging, making it the preferred method of fetal examination. As a powerful complement to ultrasonography, magnetic resonance imaging is the ultimate means of diagnosing fetal brain malformations.