Hello experts,
I am worried that the directions of the bvecs I use are not correct
and I would like to know how you would go about checking them. I have
two versions (1. from the scanner, and 2. MRICRON created by their dcm
import function). The values in these files are the same, just that
the z-dimension in the MRICRON created ones are mutliplied by -1.
I used topup, eddy and dtifit with both bvec files to produce the
first vector to look at obvious landmarks such as the corpus callosum.
The orientations look pretty good and pretty much identical between
files. So, does it matter whether the z-direction is flipped? Or is
there a way of telling the right bvecs from the wrong ones?
Thanks very much for your help,
Conny
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