Hi Freesurfers,
I want to create volume 6.25 X 6.25 X 7.5 in this position in scanner space ( x=48, y= 48, z=10)
I used the following command line to create the volume but I don't know how to choose it is position in scanner space.
 
mri_volsynth --dim 6.25 6.25 7.5 0 --o voxel.nii
 
 
I have the following question because i didn't find enough information in FS wiki about this command:
 
1. If the flag  --dim (nc nr ns nf)  is reffering to the volume dimentions. What is the fourth number  (nf ) is standing for  ?
2. what is the meaning of voxel resolution ( the flag --res (dc dr ds df) ) and what is the meaning of the numbers dc dr ds df ?
3. Is the flag c_ras ( c_r c_a c_s) reffering to the volume position. If yes is it in mm or in voxels?
 
 
Thanks in advance ,
John
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