Submitted by rumen on Tue, 03/19/2013 - 17:31
老师,您好,有几个关于Degree Centrality的问题想请教您,
在文献Functional connectivity density mapping, Dardo Tomasia,and Nora D. Volkow中作者用到local functional connectivity density和global functional connectivity density
1. REST中的Degree Centrality功能计算的局部功能连接密度还是全局功能连接密度?
2. 请问您对局部功能连接的计算怎么看?它主要的思路和有什么意义?
Submitted by YAN Chao-Gan on Thu, 03/21/2013 - 06:32 Permalink
Re: 请教关于Degree Centrality的问题
你好!
是全局,同Zuo et al., 2012.
lFCD的第一步采用算法定义局部,同ReHo在一定程度上具有概念的相似性。
Submitted by rumen on Mon, 05/06/2013 - 11:05 Permalink
Re: 请教关于Degree Centrality的问题
严老师,您好,请问
1.在计算Degree Centrality之前预处理包含smooth,对功能连接度的影响大不大?和计算完DC之后再平滑,哪个结果的可靠性更高呢?
2.我统计的思路是这样的
对三组被试的二值功能连接度密度进行ANOVA分析,
然后把差异较大的脑区统计出来做为感兴趣区域ROI,
用ALL模板做出相应脑区的mask,把每组被试每个ROI的平均DCm提取出来,做直方图对比。
请问严老师,现在REST计算出来的数据都是nii格式的,我会做mask,但是要怎样提取某个脑区的平均值?求指导。
Submitted by YAN Chao-Gan on Tue, 05/07/2013 - 05:15 Permalink
Re: 请教关于Degree Centrality的问题
1. 我认为不应该先平滑。因为degree centrality是到全脑所有其他voxel的相关,先做平滑,即自动增加了局部的连接。
2. Course Part II. REST Extract ROI signals.
Submitted by rumen on Mon, 05/13/2013 - 17:23 Permalink
Re: 请教关于Degree Centrality的问题
谢谢严老师,请问您说的是英文版的第二部分教程吗?
还有我在
1.去线性漂移的时候有warning:
在advance版本中(DPARSF_V2.2_121225)
In rest_detrend at 24
In DPARSFA_run>(parfor body) at 2256
In parallel_function at 469
In DPARSFA_run at 2255
In DPARSFA>pushbuttonRun_Callback at 1569
In gui_mainfcn at 96
In DPARSFA at 33
请老师指导一下是哪里出错了?我之前运行都没有问题。
2.在滤波的时候报错
??? Error using ==> double
Out of memory. Type HELP MEMORY for your options.
Error in ==> file_array.subsasgn at 70
subfun(sobj,double(dat),args{:});
Error in ==> y_Write4DNIfTI at 65
dat(:,:,:,:)=Data;
Error in ==> y_bandpass at 115
y_Write4DNIfTI(AllVolumeBrain,Header_Out,sprintf('%s_filtered%sFiltered_4DVolume.nii', ADataDir, filesep));
Error in ==> DPARSFA_run>(parfor body) at 2406
y_bandpass([AutoDataProcessParameter.DataProcessDir,filesep,FunSessionPrefixSet{iFunSession},AutoDataProcessParameter.StartingDirName,filesep,AutoDataProcessParameter.SubjectID{i}],
...
Error in ==> parallel_function at 469
F(base, limit);
Error in ==> DPARSFA_run at 2398
parfor i=1:AutoDataProcessParameter.SubjectNum
Error in ==> DPARSFA>pushbuttonRun_Callback at 1579
[Error]=DPARSFA_run(handles.Cfg);
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> DPARSFA at 33
gui_mainfcn(gui_State, varargin{:});
??? Error while evaluating uicontrol Callback
请老师指导一下如何改错,谢谢。
Submitted by YAN Chao-Gan on Wed, 05/22/2013 - 02:07 Permalink
Re: 请教关于Degree Centrality的问题
out of memory
看Course下拉菜单FAQ
Submitted by rumen on Thu, 05/16/2013 - 09:13 Permalink
Re: 请教关于Degree Centrality的问题
谢谢严老师,我找到怎么提取ROI值的方法了,还有两个报错请您指导一下
1.去线性漂移的时候有warning:
在advance版本中(DPARSF_V2.2_121225)
In rest_detrend at 24
In DPARSFA_run>(parfor body) at 2256
In parallel_function at 469
In DPARSFA_run at 2255
In DPARSFA>pushbuttonRun_Callback at 1569
In gui_mainfcn at 96
In DPARSFA at 33
请老师指导一下是哪里出错了?我之前运行都没有问题。
2.在滤波的时候报错
??? Error using ==> double
Out of memory. Type HELP MEMORY for your options.
Error in ==> file_array.subsasgn at 70
subfun(sobj,double(dat),args{:});
Error in ==> y_Write4DNIfTI at 65
dat(:,:,:,:)=Data;
Error in ==> y_bandpass at 115
y_Write4DNIfTI(AllVolumeBrain,Header_Out,sprintf('%s_filtered%sFiltered_4DVolume.nii', ADataDir, filesep));
Error in ==> DPARSFA_run>(parfor body) at 2406
y_bandpass([AutoDataProcessParameter.DataProcessDir,filesep,FunSessionPrefixSet{iFunSession},AutoDataProcessParameter.StartingDirName,filesep,AutoDataProcessParameter.SubjectID{i}],
...
Error in ==> parallel_function at 469
F(base, limit);
Error in ==> DPARSFA_run at 2398
parfor i=1:AutoDataProcessParameter.SubjectNum
Error in ==> DPARSFA>pushbuttonRun_Callback at 1579
[Error]=DPARSFA_run(handles.Cfg);
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> DPARSFA at 33
gui_mainfcn(gui_State, varargin{:});
??? Error while evaluating uicontrol Callback
请老师指导一下如何改错,谢谢。
Submitted by Masoud Tahmasian on Mon, 01/19/2015 - 21:46 Permalink
Re: 请教关于Degree Centrality的问题
Best regards
Masoud