Filtering changes the origin?

Submitted by adrizzo on Tue, 09/03/2019 - 09:52

Hi DPARSF experts,

I have two questions concerning the filtering step of preprocessing. When I run filtering before normalization, the origin coordinates are moved away from the AC for some of my datasets (when I check "origin" with SPM's "Display" button)--which negatively impacts the ensuing steps. I could still do filtering after the normalization but: (1) does this make sense? and (2) why could this change in the origin be happening? I'm using DPARSFA V4.5_190725 on Matlab R2018b.

Thank you in advance,

Adriana

 

Forums:

YAN Chao-Gan

Mon, 09/23/2019 - 10:56

Filtering should not change the origin. What's the format of your data?

adrizzo

Tue, 09/24/2019 - 13:40

It's .nii but converted from BRIK/HEAD after doing PESTICA/SLOMOCO. It didn't happen with all datasets, though. Thank you.