Twickler Diane M, Reichel Taylor, McIntire Donald D, Magee Kevin P, Ramus Ronald M
Department of Radiology, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Boulevard, Dallas, TX 75390-8896, USA.
Am J Obstet Gynecol. 2002 Oct;187(4):927-31. doi: 10.1067/mob.2002.127146.
Our purpose was to evaluate the ventricular atria and cisterna magna in fetuses with and without suspected central nervous system (CNS) anomalies by magnetic resonance (MR).
Measurements of the right and left ventricular atria and cisterna magna were obtained by MR in two groups: those with and without CNS anomalies. Published mean ultrasound measurements of the far field atrium were compared with MR.
MR measurements were obtained in 23 fetuses without and 37 fetuses with CNS anomalies. Atrial measurements were independent of gestational age in healthy subjects. MR atrial widths were larger in abnormal compared with normal subjects (P <.05). The atrial cutoff value derived by 2 SDs above the mean with MR is 10 mm. MR cisterna magna measurements increased with gestational age (P =.005).
The cutoff value for ventriculomegaly on MR is >10 mm. MR cisterna magna measurements are dependent on gestational age. Both ventricular atria and cisterna magna are readily measured with MR.
我们的目的是通过磁共振成像（MR）评估有或无疑似中枢神经系统（CNS）异常的胎儿的心室心房和小脑延髓池。
通过MR对两组胎儿进行右、左心室心房和小脑延髓池的测量：有CNS异常的胎儿和无CNS异常的胎儿。将已发表的远场心房超声测量平均值与MR测量值进行比较。
对23例无CNS异常的胎儿和37例有CNS异常的胎儿进行了MR测量。在健康受试者中，心房测量值与胎龄无关。与正常受试者相比，异常受试者的MR心房宽度更大（P<.05）。通过MR测量，高于平均值2个标准差得出的心房临界值为10mm。MR小脑延髓池测量值随胎龄增加（P =.005）。
MR上脑室扩大的临界值>10mm。MR小脑延髓池测量值取决于胎龄。通过MR可以很容易地测量心室心房和小脑延髓池。
