Dear SPM experts
I collected two field maps with opposite encoding directions (AP and PA). Now, I would need to calculate the deformation from these images. I have seen that FSL has a function "Topup" that does it. I wonder whether SPM has an equivalent function to do it given that SPM FieldMap seems to work with GE field maps (i.e., phase + magnitude maps).
Also, if I used the blip-up/blip-down method to unwarp raw fMRI images, shall I do it before any other preprocessing step?
Thank you in advance
Loris
|