集合磁共振成像对急性缺血性脑卒中动脉闭塞后侧支动脉显示效果及图像质量的比较  

Assessment of display effect and image quality of synthetic magnetic resonance imaging for collateral branch artery after arterial occlusion in acute ischemic stroke

作　　者：李全喜[1] 唐辉军 唐友杰 黄思健 李庆玲[2] 张杰 Li Quanxi;Tang Huijun;Tang Youjie;Huang Sijian;Li Qingling;Zhang Jie(Department of Radiology,the Third Affiliated Hospital of Sun Yat-sen University,Guangzhou 510630,China)

机构地区：[1]中山大学附属第三医院放射科,广州510630 [2]中山大学附属第三医院特诊中心,广州510630

出　　处：《新医学》2023年第11期787-792,共6页Journal of New Medicine

基　　金：广东省自然科学基金面上项目(2023A1515010256)。

摘　　要：目的比较使用集合磁共振成像(SyMRI)技术与MRI传统序列对慢性大脑中动脉闭塞引起急性缺血性脑卒中的动脉闭塞的侧支动脉显示效果及图像质量,分析两者的优劣性。方法回顾性分析67例慢性大脑中动脉闭塞引起的急性缺血性脑卒中患者的MRI检查结果,其中MRI常规序列包括T2加权像(T2WI)、T1液体衰减反转恢复(FLAIR)、T2FLAIR、时间飞跃法磁共振血管成像(TOF-MRA),SyMRI技术包括MAGiC序列,采用配对Kolmogorov-Smirnov检验对比分析TOF-MRA和MAGiC相位敏感反转恢复(PSIR)Vessel对动脉闭塞后侧支动脉显示效果,分析常规序列与SyMRI技术的信噪比(SNR)。由2名放射科医师采用盲法主观分析图像质量,采用Kappa检验分析结果的一致性。结果MAGiC序列(成像时间247 s)比MRI常规序列(成像时间438 s)的扫描时间缩短51%。动脉闭塞后MAGiC PSIR Vessel比TOF-MRA显示的侧支更多(P<0.001)。MAGiC序列比MRI常规序的SNR更高(P<0.001)。SyMRI图像质量总平均分(8.85分)高于常规序列图像质量总平均分(7.32分),MAGiC PSIR Vessel图像质量总平均分(5.32分)高于TOF-MRA图像质量总平均分(4.82分),比较差异均具有统计学意义(P均<0.05)。2名放射科医师的评估结果具有很好的一致性。结论在慢性大脑中动脉闭塞引起的急性缺血性脑卒中的MRI扫描中,SyMRI扫描比MRI常规序列扫描耗时更短,SyMRI图像质量优于MRI常规序列图像质量。在大脑中动脉闭塞后侧支的显示中,MAGiC PSIR Vessel比TOF-MRA的优势更大。Objective To compare the display effect and image quality between synthetic magnetic resonance imaging(SyMRI)and conventional MRI sequences for the collateral branch artery after arterial occlusion in acute ischemic stroke caused by chronic middle cerebral artery occlusion,and analyze the superiority and inferiority of two imaging modalities.Methods MRI findings of 67 cases of acute ischemic stroke induced by chronic middle cerebral artery occlusion were retrospectively analyzed.Conventional MRI sequences included T2-weighted image(T2WI),T1 fluid-attenuated inversion recovery(FLAIR),T2 FLAIR,timeof-flight magnetic resonance angiography(TOF-MRA),SyMRI included MAGiC sequence.Paired Kolmogorov-Smirnov test was utilized to compare and analyze the display effect of TOF-MRA and MAGiC phase-sensitive inversion recovery(PSIR)Vessel on the lateral branch artery after arterial occlusion.The signal-to-noise ratio(SNR)between conventional MRI sequences and SyMRI was compared.Image quality was assessed by two independent radiologists using blinded method.The agreement of results was assessed by kappa coefficient.Results The scan time of MAGiC sequence(imaging time 247 s)was 51%shorter than that of conventional MRI sequences(imaging time 438 s).MAGiC PSIR Vessel showed more collateral branches after arterial occlusion than TOF MRA(P<0.001).MAGiC sequences had a higher SNR than conventional MRI sequences(P<0.001).The total average score of SyMRI image quality(8.85)was significantly higher than that of conventional MRI sequences(7.32),and the total average score of MAGiC PSIR Vessel image quality(5.32)was higher than that of TOF-MRA(4.82),and the differences were statistically significant(both P<0.05).Bland-Altman analysis showed good agreement between two radiologists in results of.Conclusions In acute ischemic stroke caused by chronic middle cerebral artery occlusion,SyMRI scan is less time-consuming than conventional MRI sequence scan.The image quality of SyMRI is better than that of conventional MRI sequence.MAGiC PSIR Vess

关 键 词：脑卒中 磁共振成像 大脑中动脉 集合磁共振成像 侧支动脉 

分 类 号：R743.3[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]