双源CT大螺距联合智能调制及迭代重建技术在主动脉夹层成像中的应用  

Application of dual-source CT combined with intelligent modulation and iterative reconstruction in aortic dissection imaging

作　　者：蒲进[1] 夏春潮[1] 赵飞[1] 李磊[1] 张凯[1] 李玉明[1] 彭婉琳 张金戈[1] 刘科伶 徐旭 胡斯娴 李真林[1] Pu Jin;Xia Chunchao;Zhao Fei;Li Lei;Zhang Kai;Li Yuming;Peng Wanlin;Zhang Jinge;Liu Keling;Xu Xu;Hu Sixian;Li Zhenlin(Department of Radiology,West China Hospital,Sichuan University,Chengdu 610041,China)

机构地区：[1]四川大学华西医院放射科,成都610041

出　　处：《中华放射医学与防护杂志》2019年第1期6-10,共5页Chinese Journal of Radiological Medicine and Protection

基　　金：四川省科技厅重点研发项目(2017SZ0016)).

摘　　要：目的探讨第2代双源CT大螺距扫描联合智能调制技术及迭代重建技术在急诊主动脉夹层成像中的临床应用价值。方法连续纳入临床怀疑主动脉夹层成像的急诊患者40例,按随机数表法分为对照组和试验组,每组各20例。对照组行常规扫描,试验组行大螺距联合智能调制技术及迭代重建技术扫描。对主动脉平均CT值、平均噪声、信噪比(SNR)、对比噪声比(CNR)、有效剂量,图像整体质量和主动脉根部图像质量进行评价和分析。结果40例患者均成功完成CT主动脉夹层成像。对照组与试验组的图像整体质量无差异(P>0.05);但试验组主动脉根部图像质量比对照组好,差异有统计学意义(χ^2=22.556,P<0.05)。对照组主动脉平均CT值、平均噪声略高于试验组,但试验组的SNR、CNR高于对照组,差异有统计学意义(t=-21.042、-15.924、8.530、11.495,P<0.05)。对照组有效剂量(10.59±3.89)mSv明显高于试验组的(6.39±0.81)mSv,差异有统计学意义(t=-12.327,P<0.05)。结论双源CT大螺距扫描联合智能调制技术及迭代重建技术能保证图像整体质量,降低有效剂量,可作为急诊CT主动脉夹层的对照成像方法。Objective To explore the clinical application value of second-generation dual-source CT combined with intelligent modulation and iterative reconstruction in emergency aortic dissection imaging. Methods A total of 40 emergency patients with clinical suspected aortic dissection were included in this study. Conventional scanning was performed in the control group, and large-pitch intelligent modulation and iterative reconstruction were performed in the test group. The mean CT value, mean noise, signal noise ratio(SNR), contrast noise ratio(CNR), effective dose, image quality and aortic root image quality were evaluated and analyzed. Results Totally 40 patients successfully completed CT aortic dissection imaging. There was no difference in image quality between the two groups(P>0.05). The quality of aortic root images in the test group was better than that in the control group, and the difference was statistically significant(χ^2=22.556, P<0.05). The mean CT value and mean noise of aorta in the control group were slightly higher than those in the test group. However, SNR and CNR in the test group were higher than those in the control group, and the difference was statistically significant(t=-21.042, -15.924, 8.530, 11.495, P<0.05). The effective dose of the control group [(10.59±3.89)mSv] was significantly higher than that [(6.39±0.81)mSv] of the test group, the difference was statistically significant(t=-12.327, P<0.05). Conclusions The combined intelligent modulation technique and iterative reconstruction technique with dual-source CT large pitch scanning can meet the requirements of image quality and reduce the effective dose, and can be used as a conventional imaging method for emergency CT of aortic dissection.

关 键 词：急诊 主动脉 夹层 血管造影 计算机断层成像 

分 类 号：R543.1[医药卫生—心血管疾病]