search

sulantha2006 / VoxelStats

A MATLAB package for multi-modal voxel-wise brain image analysis
Other
16 stars 9 forks source link

Error running RFT MCC step #6

Open eeuropa opened 4 years ago

eeuropa commented 4 years ago

Hello,

I was wondering if you might help me troubleshoot a VoxelStats error. I am ultimately interested in comparing task-based fMRI data between healthy controls and dementia patients while controlling for gray matter volumes (i.e., atrophy) and age. In testing the software, I attempted to do an LM (with N=6 controls) using first-level contrast images as the independent variable, and my dependent variables were gray matter images and age. After adding the FWHM=5 in RFT MCC, I received an error after I clicked on “Run.”

I made sure to mask both the contrast images and the gray matter volumes with my mask file, and the voxel size is the same across the images. I’m attaching a screenshot of the error. Any help or guidance for troubleshooting would be greatly appreciated!

matlab_error_screenshot

Thanks, Eddie

sulantha2006 commented 4 years ago

Hi,. I cannot give a specific answer based on the info, but my guess is that your DF is too low. Cluster threshold is >10, so your result need to have t values > 10 to get a significant region.

Do you really need to perform MCC on 6 subject analysis? My guess is that nothing will survive if you do this. Can you save the images before MCC and see how the image looks?

On Fri, Dec 6, 2019 at 4:13 PM eeuropa notifications@github.com wrote:

Hello,

I was wondering if you might help me troubleshoot a VoxelStats error. I am ultimately interested in comparing task-based fMRI data between healthy controls and dementia patients while controlling for gray matter volumes (i.e., atrophy) and age. In testing the software, I attempted to do an LM (with N=6 controls) using first-level contrast images as the independent variable, and my dependent variables were gray matter images and age. After adding the FWHM=5 in RFT MCC, I received an error after I clicked on “Run.”

I made sure to mask both the contrast images and the gray matter volumes with my mask file, and the voxel size is the same across the images. I’m attaching a screenshot of the error. Any help or guidance for troubleshooting would be greatly appreciated!

[image: matlab_error_screenshot] https://user-images.githubusercontent.com/42815290/70364824-1573af80-1843-11ea-93b5-8899d89672c5.png

Thanks, Eddie

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/sulantha2006/VoxelStats/issues/6?email_source=notifications&email_token=AAHZL54JEPWV2S4W5AQ4GPLQXLTA5A5CNFSM4JXEMONKYY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4H6ZBFUA, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAHZL56XY2DXZ2JXEVYHDIDQXLTA5ANCNFSM4JXEMONA .