初始采集切面对时间-空间关联成像重建胎儿心脏影像的影响

Effect role of initial planes on the examination of fetal heart by four-dimensional echocardiography with spatiotemporai image correlation

目的研究不同初始切面对时间-空间关联成像（STIC）重建胎儿心脏各标准筛查切面的影响。方法采用不同的初始切面，用STIC软件采集胎儿心脏容积数据，重建心脏各标准筛查切面，对重建率及重建质量进行比较、评分。结果①四腔心初始切面时，主、肺动脉长轴切面重建率较差，分别为46．27％、49．25％，重建质量也较差，评分平均值分别为1，366分、1．403分；②左室流出道初始切面时，各切面重建率均在75％以上，差异无统计学意义（P=0．169），各重建切面的评分平均值均较高，评分较低的主、肺动脉长轴切面的分数也分别达到1．936分、2．051分；③主动脉长轴初始切面时，肺动脉长轴切面重建率、评分平均值均明显高于其他切面，分别为96．67％、2．617分；④各重建切面在左室流出道初始切面时重建率、评分平均值均为相同切面中较高的，主、肺动脉长轴切面在四腔心初始切面时重建率、重建质量均差于其余两初始切面，除主、肺动脉长轴切面外，其他切面在主动脉长轴初始切面时重建率、重建质量均较其余两初始切面时差。结论在胎儿超声心动图检查中，应用STIC技术能够获得与二维超声质量相当的重建切面，有利于离机分析并远程会诊。

Objective To investigate wheter different initial planes have an effect on examination ofthe fetal heart by four-dimensional ultrasound with spatiotemporal image correlation （STIC）. Methods The standard examination planes of fetal heart were rendered using the heart volume data which were acquired in different initial planes with STIC, then these rendered planes were compared and scored. Results ① At the four-chamber initial planes, the reconstruction rate of longitudinal planes of the aortic arch （46.27%） and the pulmonary artery （49.250%） were poor, in addition, the reconstruction showed low quality,and the average scores were 1.366 and 1.403, respectively. ② At the left outflow-tract initial planes, reconstruction rates of all planes were above 75%, and there was no statistical difference （P = 0. 169）. Each reconstruction plane had good score, even if the scores of longitudinal planes of the aortic arch/pulmonary artery were low, whose scores reached 1.936 and 2.051, respectively. ③ At the initial longitudinal planes of the aortic arch, the reconstruction rate （96.67%） and average reconstruction score （2. 617） of longitudinal planes of the pulmonary artery were obviously higher than those of other planes. ④ Compared with different initial planes, volume data acquired from left outflow-tract initial planes could lead to high-quality reconstructed planes of all standard examination planes. While four-chamber initial planes acquired high quality standard examination planes except longitudinal planes of the aortic arch and pulmonary artery. Volume data from initial longitudinal plane of the aortic arch acquired low-quality standard examination planes except longitudinal planes of the aortic arch and longitudinal plane of the pulmonary artery. Conclusions With STIC, sonographers can not only save the volume data for off-line analysis and remote consultation but also choose the better initial planes for themselves during theexamination of fetal hearts.