Dear SPMers,
I am currently working on fMRI data acquired on a 3T Siemens with 64 gradient coils. Unfortunately, Prescan Normalization was turned off. Now our functional images look really blurry with ringings and some parts look really flat besides the image intensity shading from the center out (dark in the center bright at the edges).
I wonder if there are any post-processing options to fix this problem. I would really appreciate any clues provided!
Thanks,
Xian
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