some of this is answered if you run the command with --help
On 8/31/15 3:33 PM, John Anderson wrote:
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 ?
Number of frames (the time dimension)
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 ?
How big the voxel is in mm
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?
The "center" of the volume in mm, where "center" is defined as
(Nvoxels-1)/2 where Nvoxels is the number rows, cols, or slices.
Thanks in advance ,
John
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