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目的:探讨四维时空关联成像(STIC)技术获得胎儿心脏标准切面的方法及应用价值。方法:应用STIC技术对180例孕18~38周的正常胎儿进行心脏容积数据的采集,容积数据在多平面模式上进行标准化步骤处理,显示9个心脏标准切面。结果:148例(82.22%)获满意STIC容积数据,9个标准心脏切面图像质量与相应的二维图像对比差异无统计学意义(P>0.05);主动脉弓、动脉导管弓、腔静脉长轴切面在各个孕周显示率的差别有统计学意义(P<0.05),其中33孕周以上组显示率较低。结论:对STIC容积数据行标准化步骤处理显示所需的多个平面是值得推荐的方法,其后处理标准图像质量满意;主动脉弓、动脉导管弓、腔静脉长轴切面在大孕周胎儿显示率相对稍低;尽管有所不足,利用STIC技术进行胎儿心脏检查仍然是传统胎儿超声心动图有利的补充。
Objective: To explore the method and application of four dimensional space-time correlation imaging (STIC) technique to obtain standard section of fetal heart. Methods: The volumetric data of 180 fetuses with gestational age from 18 to 38 weeks were collected by STIC technique. The volume data were processed in a standardized way in multiplanar pattern, showing 9 standard sections of the heart. Results: The satisfactory volume of STIC data was obtained in 148 cases (82.22%). There was no significant difference in image quality between 9 standard heart sections and the corresponding two-dimensional images (P> 0.05). The aortic arch, arterial catheter arch, There was a significant difference in the gestational weeks between the two groups (P <0.05), of which the gestational age was lower than 33 weeks. CONCLUSIONS: It is recommended that the standardization of STIC volume data be performed on multiple planes required for display and the quality of post-processing standard images is satisfactory. The display rate of fetal aorta, arterial catheter arch, Slightly lower; despite the deficiencies, the use of STIC technology for fetal heart examination is still a good complement to traditional fetal echocardiography.