UNASSIGNED: This was a retrospective and prospective observational study. This study included one hundred and three (103) singleton pregnancies for each magnetic field strength. Diffusion-weighted imaging was performed using single-shot spin-echo-planar imaging (EPI) in the axial plane of the fetal head-trunk with a slice thickness of 4mm and diffusion gradient values of b = 0 and b = 700-800 s/mm2.
UNASSIGNED: The mean ADC values of cerebral WM areas were significantly higher than the deep grey areas in the brain. The white-matter regions, lung, and placenta showed a positive and significant correlation with increasing gestational age in both field strengths. A statistically weak negative correlation was observed between increasing gestational age and ADC measurements obtained in the thalamus, cerebellum, pons, and kidney.
UNASSIGNED: This study gives the reference values for both 1.5T and 3T MRI of vital organs. The current study shows that diffusion-weighted MRI can offer a promising technique to evaluate the structural development of fetal organs and can potentially act as a biomarker for predicting the functionality of the fetal organs in abnormalities.
■这是一项回顾性和前瞻性观察性研究。这项研究包括每个磁场强度的一百零三(103)个单胎妊娠。采用单次自旋回波平面成像(EPI)在胎头干轴面上进行弥散加权成像,切片厚度为4mm,弥散梯度值为b=0,b=700~800s/mm2。
■大脑WM区域的平均ADC值明显高于大脑中的深灰色区域。白质区域,肺,在两个场强中,胎盘与胎龄的增加均呈正相关且显着相关。在增加的胎龄和丘脑中获得的ADC测量值之间观察到统计学上的弱负相关,小脑,pons,还有肾.
■这项研究给出了重要器官1.5T和3TMRI的参考值。目前的研究表明,扩散加权MRI可以提供一种有前途的技术来评估胎儿器官的结构发育,并且可以作为预测异常中胎儿器官功能的生物标志物。