“泳池征”——有助于高效识别头部T2液体衰减反转恢复序列  

The“swimming pool”sign facilitates identification of T2 fluid attenuated inversion recovery sequence on cranial MRI efficiently

作　　者：乔国艳 张子伊 刘鹏[3] 王哲涛 张舒婷[1] QIAO Guoyan;ZHANG Ziyi;LIU Peng;WANG Zhetao;ZHANG Shuting(Department of Neurology,West China Hospital,Sichuan University,Chengdu,Sichuan 610041,P.R.China;Geriatrics Clinic of Cheng Fei Hospital,Chengdu,Sichuan 610091,P.R.China;Department of Emergency,West China Hospital,Sichuan University,Chengdu,Sichuan 610041,P.R.China;Department of Radiology,West China Hospital,Sichuan University,Chengdu,Sichuan 610041,P.R.China)

机构地区：[1]四川大学华西医院神经内科,成都610041 [2]成飞医院老年病科门诊,成都610091 [3]四川大学华西医院急诊科,成都610041 [4]四川大学华西医院影像科,成都610041

出　　处：《华西医学》2022年第6期850-854,共5页West China Medical Journal

基　　金：国家自然科学基金(81870859)。

摘　　要：目的探索与传统方法相比利用“泳池征”识别液体衰减反转恢复序列(fluid attenuated inversion recovery sequence,FLAIR)的高效性及有效性,解决在临床工作医学生和低年资住院医师在区分头部MRI T1加权像(T1 weighted image,TIWI)和FLAIR序列上存在的困难。方法采用观察性研究方法,于2021年9月—11月连续纳入在四川大学华西医院神经内科轮转的规范化培训(以下简称“规培”)学员40人作为研究对象。将纳入规培学员根据抽签法分为2组,分别为“泳池征”组和对照组,每组各20人。同期选择2021年9月—11月于四川大学华西医院神经内科住院部分别诊断为中枢神经系统感染、脑血管病、痴呆综合征、多发性硬化、无明显颅内病变的患者100例,并根据其诊断分为5组,每组20例。两组分别予以相同的20张头部MRI图像,包含TIWI和T2 FLAIR序列。分别记录每位参与者的正确率、总耗时、每张图像耗时。结果每例患者均存在泳池征。在不同背景下,“泳池征”组的正确率均高于对照组(P<0.001),而总耗时、每张图像耗时均低于对照组(P<0.001)。结论在不同神经系统疾病中,“泳池征”在FLAIR序列上稳定存在。在临床实践中,与传统方法相比,通过识别“泳池征”可快速准确区分T1WI和T2 FLAIR序列。Objective To explored the accuracy and effectiveness of“swimming pool”sign in recognizing fluid attenuated inversion recovery sequence(FLAIR)compared with traditional methods,and to solve the difficulties in distinguishing T1 weighted image(TIWI)and FLAIR in clinical medical students and junior residents.Methods Using the observational research method,forty standardized training physicians who rotated in the Department of Neurology,West China hospital of Sichuan University were included as the research objects between September and November 2021.Standardized training physicians were randomly divided into“swimming pool”sign group and control group,with 20 persons in each group.In the same period,100 patients with central nervous system infection,cerebral vascular disease,dementia syndrome,multiple sclerosis and no obvious intracranial lesions were selected from the Department of Neurology,West China Hospital of Sichuan University between September and November 2021.According to the diagnosis,the patients were divided into 5 groups with 20 cases in each group.Two groups were given the same 20 images respectively,including T1WI and FLAIR.Record the accuracy,total time-consuming and time-consuming per image of each standardized training physicians.Results Each patient had“swimming pool”sign.Under different backgrounds,the accuracy of the“swimming pool”sign group was higher than that of the control group(P<0.001),while the total time-consuming and time-consuming per image were lower than that of the control group(P<0.001).Conclusions In different nervous system diseases,“swimming pool”sign is stable on FLAIR.Compared with traditional methods,“swimming pool”sign can quickly and accurately distinguish T1WI and T2FLAIR.

关 键 词：T1加权像 T2液体衰减反转恢复序列 头部磁共振成像 

分 类 号：R741[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]