Fetal and placental volumetric and functional analysis using echo-planar imaging.
Fetal and placental volumetric and functional analysis using echo-planar imaging.
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DOI：
10.1097/00002142-200102000-00006
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发表时间：
2001-02-01
期刊：
影响因子：
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通讯作者：
Duncan, K R
中科院分区：
文献类型：
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作者：
Duncan, K R
最近和过去在妊娠中使用回声平面成像(EPI)的工作使人们能够获得重要的解剖和生理信息，这使其比传统的放射学方法(如超声)具有优势。EPI是一种快速、方便地测量器官体积的方法。整个妊娠期间的体积估计与这些妊娠时已知的胎儿体重有很好的相关性。松弛时间也可以在胎盘和肺部进行测量。通过将松弛程度和体量的变化与未来的孕期相结合，可能会开发出一种“成熟指数”。这可以用来准确反映肺的成熟程度。胎盘T1、T2参数随胎龄和胎盘异常而降低。EPI可用于评估胎盘的血流灌注和子宫动脉的血流，因为它的获取时间很快。这些技术已经被应用于评估胎儿大脑内的血流灌注。
Recent and past work using echo-planar imaging (EPI) in pregnancy has allowed important anatomic and physiological information to be obtained, giving advantages over conventional radiological methods such as ultrasound. EPI is a quick, convenient method of measuring organ volumes. The volumetric estimates throughout gestation correlate well with known fetal weight at these gestations. Relaxation time measurements also can be made in the placenta and lungs. By combining the changes in relaxation and volume with gestation in the future, it may be possible to develop an "index of maturity." This could be used to accurately reflect lung maturation. T1 and T2 parameters in the placenta decreased with gestational age and with abnormal placentation. EPI can be used to assess perfusion in the placenta and flow in the uterine arteries because of its rapid acquisition times. These techniques have been applied to assess perfusion within the fetal brain.