fieldmap

[Ruben Sanchez]

Hi,

I have only one blip AP file for distortion correction. Most discussions seem to assume the presence of a pair AP and PA. 

Is one blip AP file enough to use in the HCP pipelines? What would be the correct way to do it? Thanks

Ruben

[Glasser, Matthew]

Is this spin echo or gradient echo EPI?  Do you have a high res T2w scan?

Matt.

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[Ruben Sanchez]

Gradient echo EPI ("SequenceName": "epfid2d3_77")

Yes, I have a high res T2w scan

[Ruben Sanchez]

Forgot to add, this is multi-band multi-echo blip

[Glasser, Matthew]

With gradient echo you cannot correct it accurately.