液体衰减反转恢复序列(FLAIR)脑梗塞 华北煤炭医学院硕士学位论文 3 TheapplicationofMRIFluid-attenuatedInversionRecovery ininfarctionofbrain Abstract ObjectivesFluid-attenuatedInversionRecovery(FLAIR)sequenceisalsoarelatively newtechiquewithalonginversiontimethatcannullthesignalsfromCSFandproduce heavilyT2-weightedstudies....
1FL AIR序列技术的原理及特点 FLA IR序列是一种反转恢复脉冲(inversio n recovery, IR)序列,它利用不同组织具有不同的T1值,在90b激励脉冲之前施加180b反转脉冲,经过反转时间(inversion t ime,T I)使脑脊液的T1值为零,从而不产生M R信号,而其它脑组织的T1值明显短于脑脊液,仍产生M R信号。这样FLA IR序列...
Results Of the 106 patients selected in this study, 145 were confirmed to have T2 infarct lesions on T2 weighted images and 188 on FLAIR imaging. Lesions involved brain stem, basal ganglia, semi-oval central white matter, deep ventricular periventricular white matter, cerebral cortex and ...
常规MRI增强扫描SE T1WI在中枢神经系统疾病的诊断中发挥着非常重要的作用,但存在着一定的限度,如对位于脑表面和脑室旁病变的显示有时有一定的困难.液体衰减反转恢复(fluid-attenuated inversion recovery,FLAIR)序列通过抑制正常脑脊液信号,突出病变组织的长T2信号,增加了病灶与周围组织之间的对比,在脑梗死,颅内感染,蛛网...
泰山医学院硕士学位论文FLAIR序列在低场脑MRI中的应用研究姓名:***请学位级别:硕士专业:影像医学与核医学指导教师:**20050401蘸言渡钵衰减反转恢复(fluid-attenuatedinversion-recovery,FLAIR)痔列扫撼技零是1992年由Picker公司Hajnal等研制开发并命名的磁共振耨技术,又称水{琅制成像或压水像,它的主要功能是抑制程常...
in廿lis study,145 were confirmed to have T2 infarc七lesions on T2 weighted images and188 on FLAIRimaging.Lesions involved brain stem,basal昏m班a,semi·oval central white matter,deep ventricular periventricular whitematter,cerebral cortex and subcortical and other parts of the site,including 103 ...
[ 6 ] ASHILCAGAR,GLOWACKIJ,MULLIKENJB,etal.FLAIRinbrain [J].Neuroradiology,1997,39(4):239. [7]陈登明,王润文,李季龙.快速 FLAIRT2WI 和增强后脂肪抑 :制 T1WI 对脑膜病变的诊断价值[J].中国医师杂志,2003,5(8) 1071. [8]王光彬,武乐斌.脑膜病变的 MRI 诊断和进展[J].中华放 :8. 射学杂志,...
(FSE) in MRIofthebrain.Methods 68patientswerewithbraindiseaseswereexamined withbothFLAIRandFSEse- quences.Results FLAIRsequencedetected132focusofdisease,FSEsequencedetected92focusofdisease,thefor- merwasmoresensitivethanthelatter.Conclusion FLAIRsequenceshowsitsadvantageswasmore,butforcertain areas,itisless...
Comparison of Dixon-FLAIR and FS-FLAIR sequences in brain MRI 在线阅读 下载PDF 引用 收藏 分享 摘要 目的对比水脂分离液体衰减反转恢复(Dixon-FLAIR)序列和频率选择脂肪抑制液体衰减反转恢复(FS-FLAIR)序列进行颅脑MRI脂肪抑制成像的效果及可靠性。方法前瞻性收集46例怀疑颅脑病变的患者并运用1.5 T M...展开...
摘要: Fluid attenuation inversion recovery (FLAIR) magnetic resonance images (MRI) are being used by physicians to identify and analyze white matter lesions in the brain to determine whether patients are...关键词:FLAIR MRI Image processing Standardization Brain segmentation ...