脑卒中患者CT双低技术血管成像研究  

Study of CT dual-low technology angiography in patients with stroke

作　　者：吴伟栋 吕兴胜[1] 朱艳丽[1] WU Weidong;LYU Xingsheng;ZHU Yanli(Department of Radiology,Yiwu Central Hospital,Yiwu 322000,Zhejiang,China)

机构地区：[1]义乌市中心医院放射科,浙江义乌3220001

出　　处：《中国现代医生》2023年第35期32-36,共5页China Modern Doctor

基　　金：浙江省金华市科技局公益类课题(2021-4-162)。

摘　　要：目的 探讨低电压和低浓度对比剂技术在脑卒中患者血管成像中的应用。方法 纳入2022年1月至2023年1月义乌市中心医院确诊缺血性脑卒中患者共144例为研究对象,根据成像方式不同分为常规组(管电压120kV、碘浓度370mgI/ml)、低电压组(管电压80kV、碘浓度370mgI/ml)、低浓度组(管电压120kV、碘浓度320mgI/ml)和双低组(管电压80kV、碘浓度320mgI/ml),后处理技术均采用ASiR算法3D重建。比较各组重建图像的对比信噪比(contrast-to-noise ratio,CNR)和信号噪声比(signal-to-noise ratio,SNR)、图像质量评分,颈内动脉起始段(internal carotid artery,ICA)、大脑前动脉(anterior cerebral artery,AA)A1段、大脑中动脉(middle cerebral artery,MA)M1段、大脑后动脉(posterior cerebral artery,PA)P1段、椎动脉起始段(vertebral artery,VA)和基底动脉(basilar artery,BA)的CT值,计算平均碘摄入量和辐射剂量参数,包括容积CT剂量指数(volume CT dose index,CTDIvol)和剂量长度乘积(dose length product,DLP)。结果 双低组的CNR和SNR值显著低于其他3组(P<0.05),但图像质量评分和各段动脉CT值比较,差异无统计学意义(P>0.05)。双低组CTDIvol、DLP和碘摄入量显著低于其他3组(P<0.05)。结论 CT双低技术扫描在脑卒中患者中可获得较满意的头颈部血管成像。Objective This study focused on the low voltage and low concentration contrast agent technology in vascular imaging of stroke patients.Methods Totally144 patients of ischemic stroke confirmed from January 2022 to January 2023 were enrolled.They were divided into four groups according to different imaging methods:conventional group(tube voltage 120kV,iodine concentration 370mgI/ml),low voltage group(tube voltage 80kV,iodine concentration 370mgI/ml),low concentration group(tube voltage 120kV,iodine concentration 320mgI/ml)and dual-low group(tube voltage 80kV,iodine concentration 320mgI/ml),the post-processing technology adopted ASiR algorithm for 3D reconstruction.Then to compare contrast signal-to-noise ratio(CNR)and signal-to-noise ratio(SNR)of the reconstructed image,image quality score,CT values of internal carotid artery(ICA),anterior cerebral artery(AA)A1,middle cerebral artery(MA)M1,posterior cerebral artery(PA)P1,vertebral artery(VA)and basilar artery(BA),mean iodine intake and radiation dose parameters including volume CT dose index(CTDIvol)and dose length product(DLP).Results The CNR and SNR values in dual-low group were significantly less than the other three groups(P<0.05),while image quality score and CT value of each artery were no differences among the four groups(P>0.05).What’s more,CTDIvol,DLP and iodine intake volume in dual-low group were significantly less than the others(P<0.05).Conclusion The dual-low technology scanning could obtain satisfactory head and neck CT angiography for stroke patients.

关 键 词：双低技术 迭代重建 脑卒中 头颈部 CT血管成像 

分 类 号：R445.3[医药卫生—影像医学与核医学]