Siedler D E, Filly R A
Department of Radiology, University of California School of Medicine, San Francisco.
J Ultrasound Med. 1987 Oct;6(10):573-6. doi: 10.7863/jum.1987.6.10.573.
In a retrospective review of 90 normal obstetric ultrasonographic examinations obtained between 15 and 35 menstrual weeks, measurements were made of the transverse dimensions of the thalamus, basal ganglia/insula, atrium of the lateral ventricle, and temporal operculum in the standard biparietal diameter plane. At 15 menstrual weeks the echogenic choroid plexus, filling the lateral ventricle, dominates the appearance of the cranium. During later gestation, the cerebral hemispheres and basal ganglia (telencephalic structures) show marked growth, while the diencephalon and lateral ventricles increase much less rapidly in size. This observation is made using a method of measurement that least favors the demonstration of cerebral cortical growth. Of note is that the width of the lateral ventricle remains relatively stable throughout the second and third trimesters.
在一项对90例孕15至35周正常产科超声检查的回顾性研究中，在标准双顶径平面测量了丘脑、基底神经节/脑岛、侧脑室房部和颞叶盖的横径。孕15周时，充满侧脑室的高回声脉络丛主导了颅骨的外观。在妊娠后期，大脑半球和基底神经节（端脑结构）显著生长，而间脑和侧脑室大小的增长则要慢得多。这一观察结果是使用一种最不利于显示大脑皮质生长的测量方法得出的。值得注意的是，在妊娠中期和晚期，侧脑室的宽度保持相对稳定。
