重庆医学2024，Vol.53Issue(1)：5-10,6.DOI:10.3969/j.issn.1671-8348.2024.01.002
低管电压和低对比剂联合IMR技术在椎动脉V3段3DCTA中的可行性研究
Feasibility study of low tube voltage and low contrast medium combined with IMR technology in 3DCTA of vertebral artery V3 segment
摘要
Abstract
Objective To investigate the feasibility of low-voltage,automatic tube current adjustment(ATCM)and low contrast agent concentration,dose and injection rate combined with full-model iterative re-construction(IMR)in vertebral artery V3-segment three-dimensional CT angiography(3DCTA).Methods A total of 60 patients with suspected upper cervical spine,craniocervical junction lesions undergoing cervical vertebral artery V3 segment 3DCTA in this hospital from November 2019 to May 2020 were selected and divided into the group A and B by adopting the random number table method,30 cases in each group.The group A adopted the ATCM technology of 80 kV,average tube current of 50 mAs,25 mL of contrast agent io-hexol(iodine content 300 mg/mL)combined IMR technology with an injection rate of 3 mL/s,while the group B adopted 120 kV,150 mAs fixed tube current,50 mL injection rate of 5 mL/s contrast agent iopamidol(iodine content 370 mg/mL)combined filter back projection(FBP)reconstruction technology.CT value,noise,signal-to-noise ratio(SNR),contrast noise ratio(CNR)and image sensitivity(FOM)were measured and compared between the two groups and the quality of the resulting images was evaluated.The CT volumet-ric dose index(CTDIvol)and dose-length product(DLP)were recorded,and the effective dose(ED)was cal-culated.Results There was no statistically significant difference in the vertebral arterial CT value between the two groups(P＞0.05),but the noise of the group A was lower than that of the group B(P＜0.05),SNR,CNR and FOM of the group A were greater than those of the group B(P＜0.05).The image quality of the two groups met the requirements of clinical diagnosis[(4.78±0.41)points vs.(4.85±0.35)points],and there was no statistically significant difference in the subjective evaluation of image quality(P＞0.05).The CTDIvol,DLP and ED levels in the group A were lower than those in the group B(P＜0.05).The iodine in-takes of contrast medium in the group A and group B were 7.5 g and 18.5 g,respectively,and the iodine flow rates of contrast agent were 0.9 and 1.85 mg/s,respectively,and compared with group B,the iodine intake and iodine flow rate of the group A were decreased by 59.5％and 51.4％,respectively.Conclusion Low tube voltage ATCM and low contrast concentration,dose and injection rate combined with IMR technology can not only ensure the 3DCTA image quality of vertebral artery V3 segment,but also reduce the radiation dose re-ceived by the patients,and reduce the iodine intake and iodine flow rate of contrast agent.关键词
CT血管造影/辐射剂量/对比剂/椎动脉V3段/全模型迭代重建技术Key words
computed tomography angiography/radiation dose/contrast medium/vertebral artery V3 segment/full-model iterative reconstruction technology分类
医药卫生引用本文复制引用
杨君琳,翟笃昌,周秀智,刘蓉,范国华,蔡武..低管电压和低对比剂联合IMR技术在椎动脉V3段3DCTA中的可行性研究[J].重庆医学,2024,53(1):5-10,6.基金项目
省部共建放射医学与辐射防护国家重点实验室开放课题项目(GZK1202136) （GZK1202136）
中核医疗"核医科技创新"计划资助项目(ZHY-LYB2021006) （ZHY-LYB2021006）
江苏省苏州市卫生青年骨干人才"全国导师制"培训项目(Qngg2021006) （Qngg2021006）
江苏省苏州市姑苏卫生人才计划科研项目(GSWS2021025) （GSWS2021025）
江苏省苏州市科技发展计划项目(SKY2022049) （SKY2022049）
江苏省苏州市医学会"影像医星"科技立项面上项目(2022YX-M05) （2022YX-M05）
苏州大学附属第二医院学科建设托举工程核技术医学应用项目(XKTJ-HRC20210010) （XKTJ-HRC20210010）
苏州大学附属第二医院预研基金项目(SDFEYBS1904). （SDFEYBS1904）
