Hi everyone,
I am trying to use FSL to correct 7t data using a fieldmap. The scanner was a Siemens, so I used fsl_prepare_fieldmap [fsl_prepare_fieldmap SIEMENS phase_image.nii.gz mag_image_brain.nii.gz fmap_rads 1.02]. The TE diff was 1.02 (11.02-10). I then try to use fugue to unwarp the EPI data, but it always looks distorted.
The dwell time was 0.6 ms and unwarp direction is y- (was collected A->P).
Here is what I run: fugue -i EPI.nii.gz --unwarpdir=y- --dwell=0.0006 --loadfmap=fmap_rads.nii.gz -u EPIdewarp
When I use a slightly smaller dwell time, 0.00006, it looks much cleaner, but I am not sure why it would not work for the correct dwell time.
Any thoughts or advice??
Thank you!
Allison
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