Mri_info of input: 
Volume information for input.mgz
          type: MGH
    dimensions: 210 x 210 x 165
   voxel sizes: 1.000000, 1.000000, 1.000000
          type: SHORT (4)
           fov: 210.000
           dof: 1
        xstart: -105.0, xend: 105.0
        ystart: -105.0, yend: 105.0
        zstart: -82.5, zend: 82.5
            TR: 0.00 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 =  -0.9990, y_r =  -0.0316, z_r =  -0.0314, c_r =    -3.5061
              : x_a =   0.0270, y_a =  -0.9902, z_a =   0.1368, c_a =    11.4004
              : x_s =  -0.0354, y_s =   0.1358, z_s =   0.9901, c_s =    33.6778

talairach xfm : 
Orientation   : LPS
Primary Slice Direction: axial

voxel to ras transform:
               -0.9990  -0.0316  -0.0314   107.2965
                0.0270  -0.9902   0.1368   101.2509
               -0.0354   0.1358   0.9901   -58.5497
                0.0000   0.0000   0.0000     1.0000

voxel-to-ras determinant 1

ras to voxel transform:
               -0.9990   0.0270  -0.0354   102.3824
               -0.0316  -0.9902   0.1358   111.6034
               -0.0314   0.1368   0.9901    47.4857
                0.0000   0.0000   0.0000     1.0000