Exploration on the clinical application value of optimization of magnetic resonance gradient echo T?2weighted imaging sequence parameters in patients with acute ischemic stroke

LI Yanhua; YANG Weizhen; CHEN Peng; LI Ruixiong; YAN Yejing; WANG Tianzhao

doi:10.3969/j.issn.1674-3806.2024.03.16

Abstract：Objective To explore the clinical application value of optimization of magnetic resonance gradient echo T?2 weighted imaging(GRE-T?2 WI)sequence parameters in patients with acute ischemic stroke(AIS).Methods A total of 50 AIS patients were selected from the People's Hospital of Wuzhou during June 2017 and December 2018,including 38 males and 12 females,aged 41 to 92(65.50±5.90)years.GRE-T?2 WI examination was performed on each patient using four parameters,and four groups of images were obtained.Group A was the control group,and group B had the reduced matrix,number of excitation(NEX)and time of repetition(TR)on the basis of group A,and group C adopted parallel acquisition technique and had the reduced NEX,TR and echo time(TE)on the basis of group B,and group D had the further reduced TR,TE and matrix on the basis of group C.The scanning time,image quality score,signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)of the images were compared among the four groups.Results The scanning time in group A,group B,group C and group D was 81 seconds,40 seconds,15 seconds and 11 seconds,respectively.There were significant differences in the image quality scores,SNR and CNR of the parameters among the four groups(P＜0.05).The image quality scores in group A,group B,group C and group D were(3.56±0.28)points,(3.34±0.34)points,(3.00±0.32)points and(1.68±0.40)points,respectively.There were significant differences in the image quality scores between group C and group D(P＜0.05).There were no significant differences in the image quality scores between group C and group A as well as between group C and group B(P＞0.05).Group D had the highest level of SNR,and there were significant differences in the levels of SNR between group C and group A as well as between group C and group B(P＜0.05).There was no significant difference in the level of SNR between group C and group D(P＞0.05).Group C had the highest level of CNR,and there were no significant differences in the levels of CNR between group C and group A as well as between group C and group D(P＞0.05).There was significant difference in the level of CNR between group C and group B(P＜0.05).Conclusion After adopting parallel acquisition technique and appropriately reducing matrix NEX,TR and TE parameters,the scanning time of GRE-T?2 WI is significantly short-ened,and its image quality meets the diagnostic requirements,which has great application value in the diagnosis and treatment of AIS patients.