ZangYF Group's CVs

Maximum variable size

Submitted by alex on Wed, 05/20/2009 - 20:02

 Hi,
I tried to start a seed-based connectivity analysis, but it stopped at the first, detrending stage with the error: "Maximum variable size allowed by the program is exceeded".

Is there a limit on the number of volumes or subjects that can be analysed? I have 840 volumes. I was trying a pilot analysis in 5 subjects.

Thanks for your help,
Alex

Forums: 
Resting-state fMRI topics

Anticorrelations

Submitted by alex on Sat, 05/23/2009 - 21:22

 Hi again,
I am interested in using REST to examine anticorrelations. I just wanted to check the following:
1 - If I include a global signal timeseries as a covariable, then the analysis will produce maps showing voxels significantly correlated with the seed timecourse after controlling for global signal fluctuations. That is, it is essentially like performing a global signal regression. Is this correct?
2 - Anticorrelations will be revealed by negative values in the resulting connectivity and z-maps. Is this correct?

thanks for your help,

Forums: 
Resting-state fMRI topics

[REST]Fixed the bug of reading and writing error under the linux, unix or mac operation system.

Submitted by YAN Chao-Gan on Sun, 05/24/2009 - 14:47

Hi, all!
       Some users have found that they wound meet reading and writing errors under the linux , unix or mac operation system.
       Now I have fixed this problem and released it in advance. Please click here to download it (REST2007V1.3_090525.zip).

Forums: 
Resting-state fMRI topics

ROI definition

Submitted by alex on Fri, 05/29/2009 - 13:59

 Hi,
I am trying to run a correlation for a group of subjects at once. I have the timecourses for my seed ROI in text files. It seems however, that the option for defining voxelwise ROIs using text files only allows one file to be loaded at a time. Is it possible to load multiple text files, corresponding to the seed timecourses for each subject?
Thanks for your help,
Alex

Forums: 
Resting-state fMRI topics

Data correction because of physiological noise via linear regression possible?

Submitted by marcus on Fri, 06/12/2009 - 03:22

 Dear rest-fmri team,
 I am wondering if it is possible with REST to correct my functional mri data first against noise-prone regions before I calculate the correlation map in the  "functional connectivity" setup.
 Such noise prone regions are for example white matter, ventricular time courses and the cerebrospinal fluid.

 So I would like to to something like: 

Forums: 
Resting-state fMRI topics

This week's papers of resting-state fMRI (PubMed's search result)

Submitted by admin on Sun, 06/14/2009 - 14:44

Although PubMed supplied the service for subscribers about the updates in some domain, I found not every researcher know its use.
So I would republish PubMed's search results of each week to reflect the development of resting-state fMRI.
I wish this could help some people get some most recent information. And I hope all the members of restfmri.net could also do this to share our research interest.

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