I am trying to to multimodal registration using flirt. When I open the input
nifti files I see they have header information for the real space
coordinates inside the "sform" field. My questions are as following:
1. Is flirt using any header information for registration? To me, it seems
so, since I get different results if I run flirt the same .nii image with
and without the header.
2. If header information is used, why are the results not improved when I
use the option "-usesqform" in flirt, compared to the situation without this
option?
Best regards
Erlend Hodneland
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