Functional connectivity MRI for the aging brain.
针对衰老大脑的功能连接 MRI。
基本信息
- 批准号:17590904
- 负责人:
- 金额:$ 2.24万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2006
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Although considerable progress has been made in delineating structural MRI of the aging brain, relatively little progress has been made in evaluating its anatomical and functional relationship between brain areas. Some investigators in the earlier studies have hypothesized some type of connectivity reduction model in aged brain. In this study, we have planed to develop analysis system to investigate such connection changes in the pathophysiology by using functional connectivity MRI (fcMRI) and diffusion tensor MRI (DTI). Accordingly, we have employed a novel and integrative methods such as Independent Component Analysis (ICA) and mutual information. In the results of validation stage, we found that filtering out of physiological signals (MR signal change related to cardiac cycle, respiration cycle and volumes) in pre-processing is extremely important for de-noising of fcMRI analysis. In the application stage, we have applied this method to detect the pathophysiological changes of functional connectivity in stroke patients that have certain damaged region in the brain. We found that functional connectivity in ICA results in stroke patients is relatively decreased than normal volunteer. However there are substantial fluctuation of the physiological signals in stroke patients, so we keep working further improvement in pre-processing stage of this analysis system.
尽管在描绘衰老大脑的结构 MRI 方面已经取得了相当大的进展,但在评估大脑区域之间的解剖和功能关系方面却取得了相对较少的进展。早期研究中的一些研究人员假设老年大脑中存在某种类型的连通性减少模型。在本研究中,我们计划开发分析系统,通过使用功能连接 MRI (fcMRI) 和扩散张量 MRI (DTI) 来研究病理生理学中的此类连接变化。因此,我们采用了一种新颖的综合方法,例如独立成分分析(ICA)和互信息。在验证阶段的结果中,我们发现预处理中滤除生理信号(与心动周期、呼吸周期和容量相关的MR信号变化)对于fcMRI分析的去噪极其重要。在应用阶段,我们应用该方法检测脑部某些区域受损的中风患者功能连接的病理生理变化。我们发现中风患者的 ICA 功能连接结果比正常志愿者相对降低。然而中风患者的生理信号存在较大的波动,因此我们不断对该分析系统的预处理阶段进行进一步的改进。
项目成果
期刊论文数量(30)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Imaging of peripheral nerves using DWI
使用 DWI 进行周围神经成像
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Masahiro Umeda;Makoto Kitamura
- 通讯作者:Makoto Kitamura
Mechanism of Signal Changes in Diffusion Weighted Imaging
弥散加权成像信号变化的机制
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Masahiro Umeda;Ichio Aoki;Toshihiro Higuchi;Chuzo Tanaka
- 通讯作者:Chuzo Tanaka
Cell labeling for magnetic resonance imaging with the T1 agent manganese chloride
- DOI:10.1002/nbm.1000
- 发表时间:2006-02-01
- 期刊:
- 影响因子:2.9
- 作者:Aoki, I;Yoshiyuki, T;Koretsky, AP
- 通讯作者:Koretsky, AP
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HIGUCHI Toshihiro其他文献
HIGUCHI Toshihiro的其他文献
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{{ truncateString('HIGUCHI Toshihiro', 18)}}的其他基金
Establishment and Clinical application of Neurogenesis Imaging Technique
神经发生成像技术的建立及临床应用
- 批准号:
21591860 - 财政年份:2009
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Development of neurogenesis imaging-visualization of endogeneous neural stem cell
内源性神经干细胞神经发生成像可视化的进展
- 批准号:
19591708 - 财政年份:2007
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Analyses of the influence of maternal stress on the implantation of mouse embryo
母体应激对小鼠胚胎着床的影响分析
- 批准号:
17591729 - 财政年份:2005
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Analyses of regulation mechanisms which induce invasion of human extravillous troophoblasts toward maternal uterine spiral arteries.
人绒毛外滋养层细胞侵袭母体子宫螺旋动脉的调控机制分析
- 批准号:
15591744 - 财政年份:2003
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Role of molecules expressed in human extravillous trophoblasts on the regulatory mechanism of cancer invasion
人绒毛外滋养细胞表达分子在癌症侵袭调节机制中的作用
- 批准号:
13671710 - 财政年份:2001
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Investigation of controlled human extravillous trophoblast invasion
受控的人绒毛外滋养细胞侵袭的研究
- 批准号:
11671612 - 财政年份:1999
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Identification of uterine genes induced by embryo during mice implantation.
小鼠植入过程中胚胎诱导的子宫基因的鉴定。
- 批准号:
09671676 - 财政年份:1997
- 资助金额:
$ 2.24万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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