摘要
目的:探讨256层iCT双低剂量扫描联合全模型迭代重建(iterative model reconstruction,IMR)在左心房-肺静脉CT血管造影(CT angiography,CTA)检查中应用的可行性。方法:选取2019年1—10月因临床怀疑心脏病变需行左心房-肺静脉CTA检查的50例患者的临床及影像资料。所有患者随机分为观察组与对照组,每组25例。观察组采用256层iCT进行双低剂量扫描(管电压100 kV,对比剂碘海醇剂量0.7 mL/kg),对照组采用256层iCT进行常规剂量扫描(管电压120 kV,对比剂碘海醇剂量1 mL/kg),2组均采用IMR进行图像重建。对比分析2组图像左心房中心位置、肺静脉主干开口处、左心耳腔及胸大肌4个部位的强化CT值、信噪比、对比噪声比,图像质量主观评分以及有效辐射剂量和对比剂碘摄入量。采用SPSS 19.0软件进行统计学分析。结果:2组图像质量主观评分差异无统计学意义(P>0.05)。观察组CT值均较对照组高,差异有统计学意义(P<0.05);观察组信噪比、对比噪声比均略低于对照组,差异无统计学意义(P>0.05)。观察组有效剂量及对比剂碘摄入量均显著低于对照组,差异有统计学意义(P<0.05)。结论:256层iCT双低剂量扫描联合IMR可在不降低图像诊断质量的情况下减少患者所受的辐射剂量及对比剂碘摄入量,提高了患者检查的安全性。
Objective To investigate the feasibility of applying 256-slice iCT dual low-dose scan combined with iterative model reconstruction(IMR)technique to the left atrial-pulmonary vein CTA.Methods The clinical and image data of fifty consecutive patients with clinically suspected heart disease requiring CTA examination of the left atrial-pulmonary vein from January to October 2019 were collected.The patients were randomly divided into an observation group and a control group,25 cases each.The observation group was scanned by 256-slice iCT dual low-dose(100 kV tube voltage,0.7 mL/kg contrast agent iohexol),while the control group was scanned by 256-slice iCT conventional dose(120 kV tube voltage,1 mL/kg iohexol),and both the groups used IMR for image reconstruction.The enhanced CT values,signal-to-noise ratio,contrast-to-noise ratio,subjective scores of image quality and effective radiation dose and contrast agent iodine uptake were compared and analysed for the 4 areas of the center of the left atrium,the opening of the main pulmonary vein,the left auricular cavity and the pectoralis major muscle in the images of the 2 groups.SPSS 19.0 software was used for statistical analysis.Results There were no statistically significant differences in the subjective scores of image quality between the 2 groups(P>0.05).The CT values in the observation group were all higher than those in the control group,and the differences were statistically significant(P<0.05);the signal-to-noise ratio and contrast-to-noise ratio in the observation group were slightly lower than those in the control group,and the differences were not statistically significant(P>0.05).The effective dose and contrast agent uptake of the observation group were significantly lower than those of the control group,and the differences were statistically significant(P<0.05).Conclusion 256-slice iCT dual low-dose scan combined with IMR reduces the radiation dose to the patient and the contrast agent iodine uptake without compromising the diagnostic quality of the images,i
作者
曹建
陈井亚
陈凯
武惠明
陈虎
王雅静
张愉
王中秋
CAO Jian;CHEN Jing-ya;CHEN Kai;WU Hui-ming;CHEN Hu;WANG Ya-jing;ZHANG Yu;WANG Zhong-qiu(Department of Radiology,Affiliated Hospital of Nanjing University of Chinese Medicine,Nanjing 210009,China;Department of Cardiology,Affiliated Hospital of Nanjing University of Chinese Medicine,Nanjing 210009,China;Department of Nuclear Medicine,Affiliated Hospital of Nanjing University of Chinese Medicine,Nanjing 210009,China)
出处
《医疗卫生装备》
CAS
2021年第5期48-52,共5页
Chinese Medical Equipment Journal
基金
国家自然科学基金面上项目(81771899)
江苏省中医院创新发展基金专项课题(Y2018CX52)
江苏省研究生实践创新计划项目(SJCX20_0514)。
