摘要
目的评价第二代全心运动校正算法(NG SSF)改善高心率儿童心脏CT血管造影(CTA)瓣膜图像质量的效果。方法纳入42例接受心脏CTA检查患儿,采用冠状动脉追踪冻结(SSF)及NG SSF技术重建图像(分别为SSF亚组及NG SSF亚组),与对照组主动脉瓣、肺动脉瓣、二尖瓣及三尖瓣图像质量评分进行比较。采用Kappa检验评价观察者间评分的一致性。根据心率将患儿分为<120组(n=24)及≥120组(n=18),比较经SSF和NG SSF技术处理后(分别为SSF<120亚组、SSF≥120亚组、NG SSF<120亚组及NG SSF≥120亚组)组间瓣膜图像质量评分差异。结果因对比剂硬化伪影,排除6例三尖瓣图像。观察者间图像质量评分一致性好(Kappa=0.89,P<0.05)。SSF亚组、NG SSF亚组与对照组间各瓣膜图像质量评分整体差异均有统计学意义(P均<0.05);SSF亚组与对照组各瓣膜图像质量评分差异均无统计学意义(P均>0.05);NG SSF亚组各瓣膜图像质量评分明显高于SSF亚组及对照组(P均<0.05)。<120组中,NG SSF<120亚组三尖瓣图像质量改善优于SSF<120亚组(P<0.05);≥120组中,NG SSF≥120亚组全部瓣膜图像质量改善均优于SSF≥120亚组(P均<0.05)。结论第二代NG SSF技术可显著改善高心率儿童心脏CTA瓣膜图像质量,尤其心率≥120次/分者。
Objective To observe the effectiveness of the second-generation whole-heart motion correction algorithm(NG SSF)in improving image quality of valves in cardiovascular CT angiography(CTA)in children with high heart rate.Methods A total of 42 children undergoing cardiac CTA were enrolled.The images were reconstructed with snapshot freeze(SSF)and NG SSF(SSF subgroup and NG SSF subgroup),and the scores of displaying aortic valve,pulmonary valve,mitral valve and tricuspid valve were compared with raw image(control group),respectively.Kappa test was performed to evaluate the consistency of inte-robserver scores.The children were then divided into<120 group(n=24)and≥120 group(n=18)according to the heart rates.The imaging quality scores of the valves were compared between SSF(SSF<120 and SSF≥120 subgroups)and NG SSF methods(NG SSF<120 and NG SSF≥120 subgroups).Results Because of contrast medium beam hardening artifacts,tricuspid valve image quality scores of 6 cases were excluded.The consistency of inter-observer image quality scores was good(Kappa=0.89,P<0.05).There were significant differences of image quality scores of valves among SSF subgroup,NG SSF subgroup and control group(all P<0.05),but no significant difference of image quality scores of valves was found between SSF subgroup and control group(all P>0.05).The image quality scores of valves in NG SSF subgroup were significantly higher than those in SSF subgroup and control group(all P<0.05).In<120 group,the improvement of image quality score of tricuspid valve in NG SSF<120 subgroup was more obvious than that in SSF<120 subgroup(P<0.05),while in≥120 group,improvement of image quality score of all valves in NG SSF≥120 subgroup was better than those in SSF≥120 subgroup(all P<0.05).Conclusion The second-generation NG SSF technology could significantly improve image quality of valves of CTA in children with high heart rates,especially those with heart rate≥120 beats/min.
作者
李昊岩
孙记航
田宏伟
段晓岷
彭芸
LI Haoyan;SUN Jihang;TIAN Hongwei;DUAN Xiaomin;PENG Yun(Department of Imaging Center,National Center for Children's Health,Beijing Children's Hospital,Capital Medical University,Beijing 100045,China)
出处
《中国医学影像技术》
CSCD
北大核心
2021年第12期1880-1884,共5页
Chinese Journal of Medical Imaging Technology
