July 2012

求助 运行DPARSF中出错。。

Submitted by cancas on Tue, 07/31/2012 - 16:44

各位老师，运行DPARSF中出错 这是什么原因啊 求助。。

报错如下：
Printing Graphics Windows to
F:\Analysis\FunImg\spm_2012Jul31.ps
Saving Parameters..
Moving Normalized Files:Sub_000 OKMoving Normalized Files:Sub_001 OK
??? Error using ==> rmdir
另一个程序正在使用此文件，进程无法访问。

Error in ==> DPARSF_run at 856
        rmdir('FunImg','s')

Error in ==> DPARSF>pushbuttonRun_Callback at 976
    [Error]=DPARSF_run(handles.Cfg);

Forums: 
Resting-state fMRI topics

该FDR校正的方法是否存在问题？

Submitted by 朝阳七号 on Mon, 07/30/2012 - 15:15

老师您好：
       我现在虽然在做任务态的实验，想请教您关于FDR校正的问题。我的实验是比较一组被试学习前、后脑区激活的变化，关心的是枕叶的激活。学习前单样本T检验得到激活簇A，学习后单样本T检验得到激活簇B，配对T检验后得到激活簇C。可是三个检验结果都经不起全脑或枕叶的FDR校正（即用全脑做mask或枕叶做mask，Q值取0.05）。我可不可以采用以下方法：先做P=0.05未校正，再在rest中save clusters ，分别保存P=0.05未校正的结果（A、B、C）作为各FDR检验的mask？这样的话结果经得起校正。

我暂时没找到关于此校正方法的参考文献，在此求证该方法是否合理，希望老师能够给予指导！感激不尽O(∩_∩)O~

Forums: 
Resting-state fMRI topics

AlphaSim in Rest fMRI

Submitted by modi_shilpi on Mon, 07/30/2012 - 15:12
I performed an fMRI task for attention. Then using the 'con files' of all the subjects, I performed a multiple regression analysis in SPM8, with a behavioral score as covariate to identify the regions that have a positive or negative correlation with the score. I want to perform AlphaSim for this multiple regression analysis to find the minimum cluster size for alpha 0.05. My uncorrected p value is 0.01, slice thickness is 3 mm.
 
What should I input for the mask image? Can I use the 'mask' image generated during the regression analysis?
Forums: 
Other

any problem if do two same analyses (e.g. ALFF) with two separate Matlab at the same time in the same user account?

Submitted by Miki on Sat, 07/28/2012 - 08:26

Hi, when I do two same analyses (e.g. ALFF) with two separate Matlab at the same time in the same user account, I found that it is likely that one of the analysis crashes with the other. I notice that they both produce and erase tmp files with random numbers in the /tmp/ directory constantly. If both analyses produced the same file concidently, e.g. ALFF_3462_username, and one of the analysis deleted it after using it while the other analysis suddenly lose track of such file then it will crash. Is that true?

Forums: 
Resting-state fMRI topics

有关ICA的比较选取的mask及意义

Submitted by 287391600 on Fri, 07/27/2012 - 01:23

老师：
      您好！希望可以请教一个ica的问题。
      我一直都在做ica的处理，如果我想比较病人组与正常对照组运动网络的差异，怎么定义比较的mask，因为如果在全脑水平上比较，出现差异的地方有可能是负激活的区域，可是我只要比较正的激活的运动网络，所以比较的mask就不知道怎么选了？
     另外，还是一个基本概念的问题，ica得出的具体意义怎么说，写文章的时候怎么表达，例如功能连接的比较可以说功能连接减低或增高，那么ica的比较高低怎么用语言表示呢？
   非常感谢！

Forums: 
Resting-state fMRI topics

Dartel segment出现问题

Submitted by zhj12062003 on Thu, 07/26/2012 - 20:56

你好！我们使用了DPARSFA来运行Dartel的segment和normalization ，但是matlab在运行一段时间以后总会莫名其妙的报错。我们想问问是什么原因（详见下面的error message）
Operation terminated by user during spm_figure (line 278)

In spm_progress_bar (line 86)
        spm_figure('Clear',Finter);

In spm_progress_bar (line 38)

Forums: 
Resting-state fMRI topics

有关ICA成分的选取

Submitted by 287391600 on Sun, 07/22/2012 - 12:52

老师：
      您好！
      我用mica做了一组25个人正常对照组静息态的处理，想得到运动网络，但是感觉得到的成分都不是，是我运行的问题还是怎么回事儿呢？
      参数大概选取：自动选取，运行次数是50，其余参数大致都默认

Forums: 
Resting-state fMRI topics