Hi,
I decided to change my proprocessing with using unwarping and realised now
that in both the unwarping and the normalisation fourth degree b-spline
interpolation is default.
I remember that at a SPM course we were told to use b-spline interpolation
only one time and when the EPI images are resliced directly in the realignment
step.
Is this correct? What disadvantages are combined with using the b-spline
interpolation two times benath a greater interpolation error? What are the
alternatives for my preprocessing?
thanks in advance,
Stephan
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