摘要： 目的 探讨基于双低CT扫描技术的复杂先天性心脏病 (CCHD) 患儿心脏混合现实建模的可行性。方法 收集我院2019年9月至2021年9月拟行心脏混合现实建模的30例CCHD患儿的临床资料。随机均分为常规组 (实施100 kV管电压、碘佛醇350 mgI/mL扫描方案,n=15) 和双低组 (实施80 kV管电压、碘克沙醇320 mgI/mL扫描方案,n=15)。获取2组患者CT原始数据进行心脏混合现实建模。记录并计算2组对比剂碘摄入量、剂量长度乘积 (DLP)、容积CT剂量指数 (CTDIvol)、有效辐射剂量 (ED)。测量并计算2组图像背景噪声 (BN)、信噪比 (SNR) 及对比度噪声比 (CNR)。采用4分法对混合现实建模质量结果进行主观评价。结果 与常规组比较,双低组DLP、CTDIvol、ED均显著减少 (均P < 0.05)。而2组BN、SNR、CNR比较差异均无统计学意义 (均P > 0.05)。2组混合现实心脏模型主观评分比较差异也无统计学意义 (P > 0.05)。结论 基于双低CT扫描技术的CCHD患儿的心脏混合现实建模成功。模型在降低对比剂碘剂量及扫描辐射剂量的同时,图像质量达到了临床要求。

基于双低CT扫描技术的儿童复杂先天性心脏病混合现实建模的可行性

沙金叶, 刘文源, 邹明宇

北部战区总医院放射诊断科, 沈阳 110016

收稿日期:2022-02-23出版日期:2022-10-30发布日期:2022-10-14
通讯作者:邹明宇E-mail:mingyu_zou@msn.com
作者简介:沙金叶(1996-),女,医师,硕士研究生.
基金资助:辽宁省自然科学基金(2019-ZD-1056)


关键词: 先天性心脏病, 儿童, 双低CT扫描技术, 混合现实建模, 可行性
Abstract: Objective To explore the feasibility of applying mixed reality modeling of the heart in children with complex congenital heart disease (CCHD) using the double-low computed tomography (CT) scanning technology.Methods Clinical data were collected from 30 children with CCHD who were recommended for cardiac mixed reality modeling at our hospital from September 2019 to September 2021.This study was approved by our hospital's ethics committee,and informed consent was obtained from all patients.The patients were randomly divided into the conventional group (implementing a 100 kV tube voltage,ioversol 350 mgI/mL scanning protocol,n=15) and the double-low group (implementing an 80 kV tube voltage,iodixanol 320 mgI/mL scanning protocol,n=15) in a 1:1 ratio.Raw CT data were acquired for cardiac mixed reality modeling in both groups of patients.Contrast iodine uptake,dose length product (DLP),volume CT dose index (CTDIvol),and effective dose (ED) were recorded and calculated for both groups.The background noise (BN),signal-to-noise ratio (SNR),and contrast-to-noise ratio (CNR) were measured and calculated for both groups of images.The mixed reality modeling quality results were subjectively evaluated on a 4-point scale.Results The DLP,CTDIvol,and ED were significantly lower in the double-low group than in the conventional group (P < 0.05).There were no significant differences in BN,SNR,CNR,or the subjective scores of the mixed reality heart model between the two groups (P > 0.05).Conclusion Successful mixed reality modeling of the heart in children with CCHD was performed based on double-low CT scanning techniques.The model achieves the clinical requirements for image quality while reducing the contrast iodine dose and scanning radiation dose.
Key words: congenital heart disease, children, double-low computed tomography scanning technology, mixed reality modeling, feasibility
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