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目的探讨STIC技术在测量中孕期胎儿卵圆孔面积中的应用价值,初步建立正常参考值范围并且研究卵圆孔形态及卵圆孔周边结构在三维超声下的超声表现。方法选取在我院进行胎儿畸形筛查的孕妇250例,孕20~24周。在胎儿心脏条件下以四腔心为初始切面进行STIC容积数据采集,通过图像后处理,显示卵圆孔及其周围结构并测量卵圆孔最大面积。结果 250例胎儿中192例胎儿卵圆孔STIC数据重建成功。在孕20~24周,卵圆孔面积随孕周增大而增大,与孕周呈正相关。卵圆孔的形态分为圆形、椭圆形及不规则形。卵圆孔周围结构,如上腔静脉、下腔静脉、冠状静脉窦及三尖瓣等结构及相互空间位置关系可显示。结论 STIC技术测量卵圆孔面积可行;在孕20~24周,卵圆孔面积随孕周增大而不断增大;STIC技术可观察卵圆孔形态及于周围结构的空间关系;监测卵圆孔面积可对卵圆孔提前关闭或卵圆孔过大等提供依据。
Objective To investigate the value of STIC in measuring the area of fetal foramen ovale during the first trimester of pregnancy and to establish a normal reference range and to study the morphology of foramen ovale and the ultrastructure of peripheral foramen ovale by three-dimensional ultrasonography. Methods 250 pregnant women were enrolled in our hospital for fetus malformation screening and were pregnant for 20-24 weeks. STIC volume data were collected under fetal heart conditions using four-chamber heart as the initial section, and the foramen ovale and its surrounding structures were displayed by image postprocessing, and the maximum area of foramen ovale was measured. Results A total of 192 fetal foveal STIC data from 250 fetuses were successfully reconstructed. In pregnancy 20 to 24 weeks, the area of the foramen ovale increases with gestational age increased, and gestational age was positively correlated. The shape of foramen ovale is divided into round, oval and irregular shape. The structure around the foramen ovale, such as the superior vena cava, inferior vena cava, coronary sinus and tricuspid valve, can be displayed in spatial and spatial relationship with each other. Conclusions STIC technique is feasible to measure the area of the oval hole. The area of foramen ovale increases with gestational age from 20 to 24 weeks of pregnancy. The STIC technique can observe the morphology of foramen ovale and its spatial relationship with the surrounding structures. Hole area can be closed in advance of the foramen ovale or foramen ovale provide basis.