The issue with ALFF, fALFF, ReHo and FC results

Submitted by ygwang on Fri, 05/15/2020 - 03:41

Dear R-fMRI, 

1. I did pre-processing and got the ALFF, fALFF, ReHo results by DPARSF, and then I used zALFF, zfALFF, zReHo files for the 2 sample t-test which I did in the SPM12. But there are some activation regions outside the brain, and the results look very strange. What should I do? Do these results convincing? 

2. I generated two 3*3*3 amygdala masks from AAL altas, because my data is 3*3*3mm, and then I ran the FC analysis in DPARSF. But for the left amygdala FC map two sample t-test (in SPM12 too), I got the activation covered the CSF in one contrast, and the whole brain activation (one cluster) in another contrast. May I ask where do you think the problem could be?

Attached files are the results.

Thanks very much and look forward to your reply.

Best wishes

Yuxi

 

 

AttachmentSize
Image icon zALFF_HC-MDD_withGSR.jpg89.17 KB
Image icon zALFF_MDD-HC_withGSR.jpg89.03 KB
Image icon zfALFF_HC-MDD_withGSR.jpg226.27 KB
Image icon zfALFF_MDD-HC_withGSR.jpg101.9 KB
Image icon zReHo_HC-MDD_withGSR.jpg159.54 KB
Image icon zReHo_MDD-HC_withGSR.jpg87.55 KB
Image icon Left_amygdala_HC-MDD.jpg128.7 KB
Image icon Left_amygdala_MDD-HC.jpg48.26 KB

Forums:

YAN Chao-Gan

Mon, 05/18/2020 - 00:54

You can use a gray matter mask in statistical analysis.