Hi,
Thanks for your suggestion. I tried the -nosearch option but it gives worse results, maybe because those 2 images are not roughly aligned.
I think it might fail because of the distortion in the EPI image. We did acquire the field map before but after FUGUE does not work so well for us, we decided to drop it. And there is a bias field in the EPI image, but I don't know how to correct it.
We only acquire the partial volume of the EPI. Does it also cause problem to the registration?
I will try zinke's method. Thanks!
Hope you can provide me some guidance
Thanks a lot
Van L
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