摘要
目的探讨低管电压、低浓度碘对比剂联合多模型迭代(ASIR-V)重建在Stanford B型主动脉夹层腔内修复术后(TEVAR)随访复查中的价值。方法收集128例受试者并采用随机数字表法分为实验组(100 kVp,320 mgI/mL,FBP和ASIR-V重建,n=64)和对照组(120 kVp,350 mgI/mL,FBP重建,n=64)。主动脉图像质量主观评价采用5分制评分法,客观评价采用信噪比(SNR)和对比噪声比(CNR),同时比较两组的辐射剂量和碘剂量。结果两组主动脉在不同层面的CT值、SNR、CNR和主观图像质量评分差异无统计学意义(P>0.05)。在实验组,FBP和ASIR-V重建图像的噪声、SNR和CNR差异均有统计学意义(P<0.05)。实验组辐射剂量和碘剂量比对照组低31.69%、24.14%(P<0.05)。结论低管电压、低浓度碘对比剂联合ASIR-V算法可用于Stanford B型主动脉夹层患者腔内修复术后随访复查,可在保持良好图像质量的前提下降低辐射和减少碘剂用量。
Objective To explore the value of low tube voltage,low iodine concentration contrast medium(CM)and adaptive statistical iterative reconstruction-V(ASIR-V)protocol in the follow-up of Stanford type B aortic dissection after endovascular repair.Methods 128 subjects were included and were randomly divided into the test(100 kVp,320 mgI/mL,FBP and ASIR-V reconstruction,n=64)and control(120 kVp,350 mgI/mL,FBP reconstruction,n=64)groups.Image quality of the aorta was evaluated subjectively by a 5 points grading scale and objectively by calculating the signal-and contrast-to-noise ratios(SNR and CNR,respectively).Radiation and CM doses were also evaluated.Results The CT attenuation,SNR,CNR,and subjective image quality assessment of different levels of aorta didn’t exhibit significant differences between the groups(P>0.05).In the test group,images reconstructed with FBP and ASIR-V showed significant differences in image noise,SNR and CNR(P<0.05).The test group resulted in 31.69%less radiation(P<0.05)and 24.14%less iodine weight than the control group(P<0.05).Conclusions Protocol of low tube voltage,low iodine concentration CM and ASIR-V algorithm can be used in the follow-up of Stanford type B aortic dissection after endovascular repair.It can decrease the radiation and iodine doses while maintaining good image quality.
作者
刘芸
何昌银
严高武
LIU Yun;HE Changyin;YAN Gaowu(Department of Radiology,Chongqing Emergency Medical Center,Chonging 400014,China;Department of Radiology,Suining Central Hospital,Suining 629000,China)
出处
《分子影像学杂志》
2021年第1期13-21,共9页
Journal of Molecular Imaging
基金
四川省卫生健康委员会科研课题(19PJ284)
遂宁市青年科技人才托举工程科研课题。
关键词
辐射剂量
对比剂
迭代重建
CT血管成像
主动脉夹层
胸主动脉腔内修复术
radiation dose
contrast medium
iterative reconstruction
computed tomography angiography
aortic dissection
thoracic endovascular aortic repair
