高分辨血流成像联合时间-空间相关成像技术在正常胎儿静脉导管检查中的应用

Application of high-definition flow imaging with spatiotemporal image correlation in evaluation on normal fetal ductus venosus

目的 :探讨高分辨血流成像(High-definition flow imaging,HDFI)联合时间-空间相关成像技术(Spatiotemporal image correlation,STIC)在显示正常胎儿静脉导管(Dutus venosus,DV)方面的价值。方法 :利用彩色多普勒和HDFI联合STIC成像对155例2015年3月—2016年9月期间于我院门诊进行常规产科超声检查的孕18～37周正常胎儿进行检测。彩色多普勒分别对胎儿上腹部斜横断面和旁矢状切面进行扫查。用HDFI模式显像,获得清楚的胎儿主动脉弓或导管弓长轴切面时,开启STIC程序采集容积数据集,利用图像后处理软件对容积数据分析重建,获取胎儿DV的三维图像。对比三种方法对胎儿DV的显示情况。结果:HDFI联合STIC对孕18～29周胎儿的DV显示率>90%,而孕>30周的胎儿彩色多普勒成像明显优于HDFI联合STIC成像。结论:孕30周前,HDFI联合STIC技术可作为评价胎儿DV的一种新方法,可显示胎儿DV的形态及其与周围血管的空间位置关系,为观察胎儿DV的立体形态提供了可能。

Objective： To investigate the application value of high-definition flow imaging（HDFI） and spatiotemporal image correlation（STIC） technology to identify normal fetal ductus venosus（DV）. Methods： From March 2015 to September 2016, DV was detected in 155 normal fetuses at 18～37 weeks of gestation using color Doppler echocardiography and HDFI-STIC imaging. Color Doppler echocardiography was performed with an oblique transverse plane of the fetal abdomen and scanning around the midsagittal plan. HDFI pattern was used to obtain a clear fetal aortic arch or a long axial section of the ductal arch, and then the STIC program was used to collect volume data, and the 3D images of the fetal DV were obtained by the post processing software. Comparisons were made between the three methods for visualization of the normal fetal DV. Results：HDFI-STIC showed a visualization rate 〉90% of DV at 18 ～29 weeks of gestation, while the color Doppler echocardiography method did a better work than HDFI-STIC imaging in 30 weeks of pregnancy. Conclusion： HDFI-STIC technology is a new method for evaluating the DV of fetal before 30 weeks of gestation, as it can show the shape of the fetal DV and its spatial relationship with the surrounding vascular. It is possible to observe the three-dimensional morphology of fetal DV.