sdm-help-list
sdm-help-list > Number of voxels used to calculate family-wise correction
Aug 3, 2019 11:08 PM | Sidhant Chopra - Monash University
Number of voxels used to calculate family-wise correction
Hi SDM team,
We are conducting a VBM meta-analysis. We have full t-maps from all studies. The t-maps we have are for the cerebellum only and were generated using the SPM SUIT toolbox. While the results we are getting from SDM are reasonable, we just wanted to confirm how exactly the voxel-wise permutation-based FWE correction is being calculated. We noticed that the sdm_mask.nii.gz file includes whole-brain grey matter, rather then just the cerebellum.
1) Does this mean that the FWE correction is based on the number of voxels across the whole brain, rather than the the inputted t-maps which were just of the cerebellum?
2) if so, is there a way to ensure that the correction is only based on voxels were present in the t-maps?
Thank you!
We are conducting a VBM meta-analysis. We have full t-maps from all studies. The t-maps we have are for the cerebellum only and were generated using the SPM SUIT toolbox. While the results we are getting from SDM are reasonable, we just wanted to confirm how exactly the voxel-wise permutation-based FWE correction is being calculated. We noticed that the sdm_mask.nii.gz file includes whole-brain grey matter, rather then just the cerebellum.
1) Does this mean that the FWE correction is based on the number of voxels across the whole brain, rather than the the inputted t-maps which were just of the cerebellum?
2) if so, is there a way to ensure that the correction is only based on voxels were present in the t-maps?
Thank you!
Threaded View
Title | Author | Date |
---|---|---|
Sidhant Chopra | Aug 3, 2019 | |
Joaquim Radua | Aug 19, 2019 | |