Hi there,
> I'm trying to make topup function works but I run into a segmentation fault error.
> I've got 2 b0 with a different Phase Encoding (P->A and A->P)
>
> I created the acquisition_parameters.txt file and like the user guide says I can put a 1 for the fourth column but it doesn't work.
>
> So here is my command line :
>
> topup --imain=b0s.nii --datain=acquisition_parameters.txt --out=my_topup_results
add --config=b02b0.cnf to that
>
> My acquisition_parameters.txt file looks like this:
>
> 0 1 0 1
> 0 -1 0 1
>
> In addition, I don't understand how to calculate the fourth column so here the parameters of my sequence. If somebody can explain me how to do that.
>
> TR = 9300ms , TE=94ms, Echo spacing = 0.69ms, 96x96 matrix and 65 slices,
> Phase partial Fourier 6/8 and finally bandwidth 1628Hz/Px
the relevant time in your case is (96-1)*0.00069 = 0.0656 seconds.
Good luck Jesper
>
> Thank for your help
>
> Arnaud
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