四维时空关联成像技术在中晚孕胎儿心脏筛查中的应用

Application of Four-Dimensional Spatio-Temporal Image Correlation in Screening of Fetal Cardiac Structure in Second and Late Trimester Pregnancy

目的探讨四维时空关联成像（STIC）技术在中晚孕胎儿心脏筛查中的应用价值。方法运用STIC技术对180例孕18-38周孕妇胎儿进行心脏容积数据采集，采用动态正交三平面模式，显示4个筛查切面。结果180例孕妇中，148例（82．2％）获满意STIC容积数据，采集时间明显少于二维切面采集时间（P〈0．05）；STIC采集的心脏四腔心、左室流出道、右室流出道、三血管气管切面图像质量满意率与二维超声图像质量比较差异无统计学意义（P〉0．05）。结论STIC技术可缩短胎儿心脏扫描时间；采集的胎儿心脏标准图像质量满意，可应用于中晚孕胎儿心脏筛查，其容积数据采集受到胎儿脊柱声影、胎动频繁、羊水量异常等影响。

Objective To explore the application value of four-dimensional spatio-temporal image correlation （STIC） technology in a screening of fetal cardiac structure in the second and late trimester pregnancy. Methods Fetal heart volume datasets were acquired by STIC from 180 normal fetuses at 18 to 38 weeks＇ gestation. Analysis of the volume datasets using the described technique to display 4 screening echocardiographic planes in the dynamic multi-planar display mode was performed off-line. Results Among 180 pregnant women, the STIC volume data were obtained successfully in 148 cases （82.2%）, STIC sweep was obviously more timesaving than that of cardiac screening（P 〈0. 05）. There was no significant difference in the image quality of four-chamber view, left ventricular outflow tract view, right ventricular outflow tract view and three vessel-trachea view between STIC and two-dimensional ultrasound（P 〉0.05）. Conclusion STIC provides us a timesaving sweep for fulfilling fetal cardiac scanning. The STIC acquisition is of satisfactory qulity,which can be applied to a screening of fetal heart in the second and late trimester pregnancy. The STIC acquisition has relationship with spine acoustic shadow, frequent fetal movement and abnormal amniotic fluid volume.