摘要
目的:探讨多结构磁共振成像(MRI)皮质下血管认知障碍(SVCI)患者白质(WM)完整性的破坏情况,探讨WM损伤,结构网络中断与一般认知功能下降之间的关系。 方法:28例SVCI患者和20例对照组患者进行结构MRI扫描和神经心理学评估。比较两组WM体积(WMV),WM高信号(WMH),腔隙性梗死(LI),扩散张量成像参数和结构网络特征。 计算这些参数与一般认知功能之间的相关性。 结果:两组之间正常出现的WM(NAWM)和结构网络特征的WMV,WMH负荷,LI数,平均分数各向异性(FA),平均扩散峰值位置(MD)和峰值位置显着不同。 WM微结构和网络特性的破坏普遍。 WMV,WMH负载,平均FA和NAWM MD的峰值位置解释了结构网络特征方差约70%。 最短路径长度与LI号解释了z分数的47.5%的差异。 结论:SVCI与大脑中WM完整性的广泛破坏有关。 网络特征可能是WM完整性的综合反映和一般认知功能的优越预测因子,而LI是认知障碍的独立预测因子。
关键词: 皮质血管认知障碍,白质,扩散张量成像,结构网络,白质高信号,腔隙性梗死。
Current Alzheimer Research
Title:White Matter Integrity in Subcortical Vascular Cognitive Impairment: A Multimodal Structural MRI Study
Volume: 14 Issue: 9
关键词: 皮质血管认知障碍,白质,扩散张量成像,结构网络,白质高信号,腔隙性梗死。
摘要: Objective: To investigate the disruption of white matter (WM) integrity in patients with subcortical vascular cognitive impairment (SVCI) with multimodal structural magnetic resonance imaging (MRI), and to explore the relationships between WM damage, structural network disruptions, and general cognitive function decline.
Methods: Twenty-eight patients with SVCI and twenty control subjects underwent structural MRI scans and neuropsychological assessment. WM volume (WMV), WM hyperintensities (WMH), lacunar infarcts (LI), diffusion tensor imaging parameters and structural network characteristics were compared between two groups. Correlations between these parameters and general cognitive function were calculated. Results: WMV, WMH load, LI number, mean fractional anisotropy (FA), peak height and peak location of mean diffusivity (MD) of normal-appearing WM (NAWM) and structural network characteristics were significantly different between the two groups. Disruption of WM microstructure and network characteristics was widespread. WMV, WMH load, mean FA and peak location of MD of NAWM explained about 70% of the variance in structural network characteristics. Shortest path length with LI number explained 47.5% of the variance in z-scores. Conclusion: SVCI was associated with widespread disruptions of WM integrity in the brain. Network characteristics may be a comprehensive reflection of WM integrity and a superior predictor of general cognitive function, while LI was an independent predictor of cognitive impairment.Export Options
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Cite this article as:
White Matter Integrity in Subcortical Vascular Cognitive Impairment: A Multimodal Structural MRI Study, Current Alzheimer Research 2017; 14 (9) . https://dx.doi.org/10.2174/1567205014666170329113707
DOI https://dx.doi.org/10.2174/1567205014666170329113707 |
Print ISSN 1567-2050 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5828 |
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