MRI Brain Image Segmentation based on Wavelet and FCM Algorithm Image segmentation plays a preliminary and indispensable step in medical image processing. Magnetic resonance (MR) segmentation used for brain tissues extraction white matter (WM), gray matter (GM) and cerebrospinal fluids (CSF). These ...
The semi-automatic volumetric method had high test-retest reli- ability (ICC 0.975, p1/40.001) for TIV, VV, WBV on FLAIR MRI. Conclu- sions: The semi-automatic volume measuring of TIV, VV, WBVon FLARE was a reliable method but for the SSV measurement it was less reliable. Less ...
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...
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 ...
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....
& Ishida, O. MRI of head injury using FLAIR. Neuroradiology 39, 239–242 (1997). https://doi.org/10.1007/s002340050401 Download citation Issue DateApril 1997 DOIhttps://doi.org/10.1007/s002340050401 Key words Brain injury Fluid-attenuated inversion-recovery (FLAIR) magnetic resonance imaging...
断值.材料和方法:对21例经常规MRI诊断为脑梗塞的患者进行FLAIR序列成像, 并与SE序列加权像比较.结果:在21例脑梗塞病 例中.FLAIR显示病变较T2加权像清楚明确的17例(占81.0%).加权像难"发现病 灶的(>1个)l5例占714%. 结论:FLAIR申列对脑梗塞病变的显示具有更高的敏感性特别适合于发现大脑半 ...
正常脑MRI的FLAIR序列表现 正常脑M RI的FLAIR序列表现X 马得廷1,刘志强2,郭岩2,孔庆奎2 (11泰山医学院2002级研究生,山东泰安271000;21泰安市中心医院,山东泰安271000)关键词:磁共振成像;液体衰减反转恢复序列;脑 中图分类号:R44512文献标识码:A文章编号:1004-7115(2005)03-0267-02 现在,液体衰减反转恢复(fluid-...
(首都医科大学附属北京天坛医院神经影像中心,北京 100050) [摘要] 目的 比较 3.0T 高场 下扩散加权成像 (DWI)及液体衰减反转恢复 (FLAIR)在诊断颅内表皮样囊肿中的价值.方法 23例常规 MRI检查考虑为颅内表皮样囊肿的患者,术前20例加扫了 DWI,21例加扫了 FLAIR,二者皆使用者 18例,其中4例获得了表观扩散系数...
White matter tracts and nuclei of the brain stem were determined on 3D and 2D FLAIR images and 2D T2WI by referring to anatomic atlases and DTI color maps. The subjective assessment of the visibility by using a 4-point grading system and the contrast ratio of the structures on 3D and 2D ...