McCarthy S M, Filly R A, Stark D D, Hricak H, Brant-Zawadzki M N, Callen P W, Higgins C B
Radiology. 1985 Feb;154(2):427-32. doi: 10.1148/radiology.154.2.3966129.
Nine patients who were 34-36 weeks pregnant underwent magnetic resonance (MR) imaging. Sagittal images using spin echo technique (TR 2.0 sec, TE 28 msec) were optimal for delineating fetal anatomy. The fetal cardiovascular, pulmonary, and central nervous systems were depicted in all cases. The heart and major vessels were readily seen due to the natural contrast of flowing blood. The intensity of the fluid-filled lungs greatly increased with a longer TR or TE, delimiting thorax from liver. The brain was relatively featureless due to the lack of gray-white matter differentiation. The umbilical cord within the amniotic fluid and its insertion into the placenta and fetus was identified in all cases. MR is a new modality for fetal imaging that offers tissue-characterization information that complements the superior anatomic detail of ultrasound scanning.
9名怀孕34至36周的孕妇接受了磁共振（MR）成像检查。使用自旋回波技术（TR 2.0秒，TE 28毫秒）的矢状位图像最适合描绘胎儿解剖结构。所有病例均显示了胎儿的心血管、肺和中枢神经系统。由于流动血液的自然对比，心脏和主要血管很容易被看到。随着TR或TE延长，充满液体的肺的信号强度大大增加，从而将胸部与肝脏区分开来。由于缺乏灰白质分化，大脑相对无明显特征。所有病例均识别出羊水中的脐带及其与胎盘和胎儿的附着处。磁共振成像（MR）是一种用于胎儿成像的新方法，它提供的组织特征信息可补充超声扫描出色的解剖细节。
