# transform file register.lta # created by XYZ on Tue May 6 10:42:24 2014 type = 0 nxforms = 1 mean = 0.0000 0.0000 0.0000 sigma = 10000.0000 1 4 4 3.431423187255859e+00 -2.041964828968048e-01 -7.740691304206848e-03 2.756774902343750e+01 2.015136182308197e-03 1.456980705261230e-01 -3.996406793594360e+00 1.583389892578125e+02 -2.042964249849319e-01 -3.428334712982178e+00 -1.693789362907410e-01 2.647491455078125e+02 0.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 src volume info valid = 1 # volume info valid filename = TEMPLATE_FILE_PATH/template.nii volume = 64 64 35 voxelsize = 3.437500000000000e+00 3.437499761581421e+00 4.000000000000000e+00 xras = -9.972996711730957e-01 -7.120382040739059e-02 1.798351481556892e-02 yras = 6.254287064075470e-02 -9.518167972564697e-01 -3.002218902111053e-01 zras = 3.849399834871292e-02 -2.982859909534454e-01 9.537000060081482e-01 cras = 1.612358093261719e+00 1.616348266601562e+00 4.727973937988281e+00 dst volume info valid = 1 # volume info valid filename = SUBJECT_FILE_PATH/orig.mgz volume = 256 256 256 voxelsize = 1.000000000000000e+00 1.000000000000000e+00 1.000000000000000e+00 xras = -1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 yras = 0.000000000000000e+00 0.000000000000000e+00 -1.000000000000000e+00 zras = 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 cras = 0.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 subject fbirn-anat-101.v4 fscale 0.150000
The matrix (starting with 3.4375 ...) is the registration matrix. xras is the direction cosines for the column direction (in scanner RAS coordinates). yras and zras are the direction cosines for the row and slice directions. cras is the center of the volume in RAS coordinates. The first set of parameters is for the source volume. The second set is for the target volume.