DPARSF ROI definition

Submitted by masakiy on
Hi I m quite new for this field. I m trying to choose simultaneously AAL and CC200 roi for ROI correlation FisherZ matrix. Finally I have 316x316 Matrix (AAL 116 and CC200). For the next step I hope divide this for 2 matrices. Which can I divide first 116 or 200 from 316 for each row and column ? I appreciate any advice Thank you Masaki

questions about 'Normalize to Symmetric Template'

Submitted by yaqiong on

Hi Chaogan,

I have a couple of questions about 'Normalize to Symmetric Template' in DPARSFA to ask you for help. 

1) Based on Zuo et al., 2010, normalization to symmetrica template was implimented after all the preprocessing steps but before VMHC analysis. I was wondering, does it matter to perform it at different steps, say after standard normalization or after smoothing?

How to calculate center coordinate of a mask

Submitted by yaosir on

Dear Chao-Gan,

I am recently planning to conduct a coodinate-based meta-analysis, which requires center coodinates of the seed regions. Since some studies used pre-defined masks (such as a region from AAL atlas), center coodinates were not directly provided. I was wondering whether I could calculate center coordinate of a mask through DPABI or some other ways?

Best,

Vincent

resting state granger causality

Submitted by ladansh on
Forums

Dear experts, 

I want to apply granger causality to my resting state data using REST toolbox.
I'm pretty new in this field so I don't know if I'm doing the right thing. 
Are there any specific considerations that I have to take into account before applying GC to my data?
what characteristics should my data have to be eligible for granger causality calculations?

Best, 
Ladan

Error in CWAS analysis; how to input a regressor file (txt)

Submitted by jwhnavy on

Dear Dr. Yan,

Thank you for developing a wonderful toolbox to analyze resting-state fMRI data. I'd like to use CWAS implemented in DPARSFA for my project. However, when conducting CWAS with my data, I came across an error.  I've used resliced time-series data and mask images as the voxel size of isotropic 4 mm. I guess the error was caused by a regressor file I used. I plan to perform the CWAS analysis with IQ or age (i.e., continuous variable) like Shehzad et al. (2014)'s study