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Hi FreeSurfer gang, I'm using ADNI's pre-processed data to train a neural network. Specifically, for each included subject I'm using FreeSurfer Cross-Sectional brainmask.mgz (as input). My question is: are these ADNI pre-processed brainmask.mgz volumes already B1-corrected? (All ADNI subjects that I'm including in my project have B1 acquisition). If not, is there a simple way to perform B1 correction on brainmask.mgz? Thank you so much,Arman Arman Avesta, MD Radiology Resident & PhD Student Yale School of Medicine & Yale Graduate School of Arts and Sciences
Email: arman.avesta@yale.edu Phone: 617-763-6632
If it came from running recon-all, then it is corrected for bias fields. Note that B1 is a particular type of bias field (often quite minor at 3T and below).
On 3/18/2021 2:25 PM, Arman Avesta wrote:
External Email - Use Caution
Hi FreeSurfer gang,
I'm using ADNI's pre-processed data to train a neural network. Specifically, for each included subject I'm using FreeSurfer Cross-Sectional brainmask.mgz (as input).
My question is: are these ADNI pre-processed brainmask.mgz volumes already B1-corrected? (All ADNI subjects that I'm including in my project have B1 acquisition).
If not, is there a simple way to perform B1 correction on brainmask.mgz?
Thank you so much, Arman
*Arman Avesta, MD* Radiology Resident & PhD Student Yale School of Medicine & Yale Graduate School of Arts and Sciences
Email: arman.avesta@yale.edu Phone: 617-763-6632
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