I have two questions" 1. the type of aparc+aseg.mgz file is INT(1). after save_mgh(v, 'aparc+aseg82regions.mgz',M,mr); I find the type of aparc+aseg82regions.mgz is FLOAT (3). How to save aparc+aseg82regions.mgz file in INT ?
2. I want to convert the aparc+aseg82regions.mgz to .nii file (in native space) I use the following command lines: mri_label2vol --seg aparc+aseg82regions.mgz --temp rawavg.mgz --o aparc+aseg82regions-rawavg.mgz --regheader aparc+aseg82regions.mgz mri_convert -odt int aparc+aseg82regions-rawavg.mgz aparc+aseg82regions-rawavg.nii
after these, I found the dimension is changed from 256*256*256 to 176*204*200. Volume information for aparc+aseg82regions.mgz type: MGH dimensions: 256 x 256 x 256 voxel sizes: 1.0000, 1.0000, 1.0000 type: FLOAT (3) fov: 256.000 dof: 1
Volume information for aparc+aseg82regions-rawavg.mgz type: MGH dimensions: 176 x 204 x 200 voxel sizes: 1.0000, 1.0000, 1.0000 type: INT (1) fov: 204.000 dof: 0
Volume information for aparc+aseg82regions-rawavg.nii type: nii dimensions: 176 x 204 x 200 voxel sizes: 1.0000, 1.0000, 1.0000 type: INT (1) fov: 176.000 dof: 0
I guess I must have done something wrong. But I can not figure out.
Best,
Jinsong