100kVp条件下全模型迭代技术对头颈CTA图像质量的影响  

Evaluation on the Effect of FIRST on Head and Neck CTA Image Quality at 100kVp

作　　者：陆晓平 王沄[1] 徐敏 马壮飞 王彦玲 付海鸿[1] 陈钰[1] 金征宇[1] LU Xiaoping;WANG Yun;XU Min;MA Zhuangfei;WANG Yanling;FU Haihong;CHEN Yu;JIN Zhengyu(Department of Radiology,Peking Union Medical College Hospital,Beijing 100730,China;Canon Medical System(China)Co.,Ltd.,Beijing 100015,China)

机构地区：[1]中国医学科学院北京协和医院放射科,北京100730 [2]佳能医疗系统(中国)有限公司,北京100015

出　　处：《中国医疗设备》2021年第10期80-83,95,共5页China Medical Devices

基　　金：国家自然科学基金项目(82001814)。

摘　　要：目的探讨100 kVp条件下全模型迭代技术(Forward Projected Model-Based Iterative Reconstruction Solution,FIRST)对头颈CT血管造影(CT Angiography,CTA)图像质量的影响。方法分析33例行头颈CTA检查的患者并重建出滤波反投影(Filtered Back Projection,FBP)、混合迭代重建算法(Adaptive Iterative Dose Reduction 3D,AIDR-3D)和FIRST三组图像,对三组图像进行最大密度投影处理。从客观测量和主观评分两方面来评价不同重建方式对头颈CTA图像质量的影响。结果客观指标:三组图像间的CT值在主动脉弓处相比具有统计学差异(P<0.001),其余部位结果比较,差异无统计学差异(P>0.05);三组间的SD值、信噪比和噪声比值,在各血管均具有统计学差异(P<0.05)。主观评分:三组不同重建图像均能满足诊断要求,FBP组与AIDR-3D组图像间评分无统计学差异(P>0.05),FIRST组评分与FBP组、AIDR-3D组相比均具有统计学差异(P<0.05)。结论在头颈CTA检查图像质量上,与FBP和AIDR-3D重建算法相比,FIRST重建技术能够降低图像噪声,提高图像信噪比,在颅内细小血管的显示能力方面表现更佳,可以在临床检查中加以应用。Objective To evaluate the effect of forward projected model-based iterative reconstruction solution(FIRST)on head and neck CTA image quality at 100 kVp.Methods Thirty-three patients undergoing head and neck CTA were analyzed.Three sets of images were reconstructed from the raw data,which were filtered back projection(FBP),adaptive iterative dose reduction 3D(AIDR-3 D)and FIRST.The effect of different reconstruction modes in head and neck CTA image quality from both objective measurement and subjective scoring were evaluated.Results Objective measurement:CT values of aortic arch were statistically different among the three sets’images(P<0.001),while there was no significant difference in other parts(P>0.05).The SD value,signal to noise ratio and noise ratio of the three sets were statistically different in each blood vessel(P<0.05).Subjective scoring:Different reconstructed images of the three sets could meet the diagnostic requirements.There was no statistical difference between the scores of the FBP group and the AIDR-3D group(P>0.05),and the scores of the FIRST group were statistically different from those of the FBP group and THE AIDR-3D group(P<0.05).Conclusion In terms of image quality of head and neck CTA examination,compared with FBP and AIDR-3D reconstruction algorithms,FIRST can significantly reduce image noise and improve image signal to noise ratio.FIRST has better performance on displaying small intracranial blood vessels.It can be used in clinical examination.

关 键 词：头颈CTA 滤波反投影 混合迭代重建 全模型迭代 图像质量 

分 类 号：R816.1[医药卫生—放射医学]