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Dear Freesurfer team, 

I messaged the team on my MPF map analysis and a suggestion was made that I register the MPF maps on the T1 MPRAGE images. However, I did not acquire MPRAGE  but FLASH images. 
Can I used those instead ?  Again, I tried even using only the T1 FLASH images and it did not work so I am not sure whether the registration of the MPF maps on it will work or not. Is there anyway around this?

Thank you.