If I have a scan, for instance a 32 direction 1000 bvalue scan with a single b0. The phase encoding for the entire scan is the same. Does it matter at all what I put in acqparams for eddy?
will:
0 1 0 0.5
or
1 0 0 0.5
or
0 0 1 0.5
for acqparams produce different outputs? My understanding is that the phase encoding direction is only used for susceptibility correction in topup, but if topup is not used then it should not matter what the direction is set as?
Thanks,
-Justin
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