Volume information for freesurfer.nii
          type: nii
    dimensions: 170 x 256 x 256
   voxel sizes: 1.200000, 1.000000, 1.000000
          type: SHORT (4)
           fov: 204.000
           dof: 1
        xstart: -102.0, xend: 102.0
        ystart: -128.0, yend: 128.0
        zstart: -128.0, zend: 128.0
            TR: 6.81 msec, TE: 0.00 msec, TI: 0.00 msec, flip angle: 0.00 degrees
       nframes: 1
       PhEncDir: UNKNOWN
       FieldStrength: 0.000000
ras xform present
    xform info: x_r =  -1.0000, y_r =  -0.0000, z_r =  -0.0000, c_r =    -0.6003
              : x_a =   0.0000, y_a =   1.0000, z_a =   0.0000, c_a =    17.5182
              : x_s =  -0.0000, y_s =  -0.0000, z_s =   1.0000, c_s =    16.7755
Orientation   : LAS
Primary Slice Direction: axial

voxel to ras transform:
               -1.2000  -0.0000  -0.0000   101.3997
                0.0000   1.0000   0.0000  -110.4818
               -0.0000  -0.0000   1.0000  -111.2245
                0.0000   0.0000   0.0000     1.0000

voxel-to-ras determinant -1.2

ras to voxel transform:
               -0.8333  -0.0000  -0.0000    84.4998
               -0.0000   1.0000  -0.0000   110.4818
               -0.0000  -0.0000   1.0000   111.2245
               -0.0000  -0.0000  -0.0000     1.0000