256层iCT剂量优化技术在婴幼儿复杂先天性心脏病中的应用

Application of dose optimization technique on 256-slice iCT in infants and young children with comoplicated congenital heart disease

摘要:

目的 探讨256层iCT剂量优化计算机体层血管成像（CTA）技术在小儿复杂先天性心脏病术前诊断中的应用价值。方法 选取某院先天性心脏病患儿50例，根据检查方法分为回顾组、前瞻组，分别采用回顾性、前瞻性心电门控心脏CTA检查，对两组扫描图像进行图像质量评估、差异分析；比较两组患儿有效射线辐射剂量；以手术结果为金标准，比较术前CTA、超声心动图（UCG）及手术符合率。结果 两组患儿扫描图像差异无统计学意义（P?>0.05）；前瞻组容积CT计量指数（CTDI）、剂量长度乘积（DLP）、有效剂量（ED）值与回顾组比较，差异有统计学意义（P?<0.05），前瞻组低于回顾组。术前总体CTA诊断手术符合率与UCG诊断比较，差异有统计学意义（P?<0.05），CTA优于UCG。结论 剂量优化心脏CTA检查对复杂先天性心脏病术前诊断具有临床意义。

Abstract:

Objective To investigate the value of 256-slice iCT dose-optimized CTA technique in the pre-operative diagnosis of complex congenital heart disease in children. Methods Fifty patients with congenital heart disease were enrolled. Retrospective and prospective ECG-gated cardiac CTA were used to evaluate the image quality and difference between the two groups. The independent sample t-test was used. The effective radiation doses of the two groups were compared and analyzed. The surgical results were used as the gold standard, and the coincidence rate of preoperative CTA, UCG and surgical results were compared. Results There were no significant differences between the two groups (P?>?0.05). The values of Volume CT dose index (CTDI), Dose-length product (DLP), and Effective dose (ED) in the prospective group were lower than those in the retrospective group (P?