table of contents
LIPSIA     Applying a transformation matrix
Transformation of 2D single slices: vdotrans
Once a transformation matrix has been computed by 'vreg3d', it can be applied to the 2D anatomical slices acquired during the fMRI experiment (or to a 2D zmap).
The program 'vdotrans' rotates and translates the input data according to the information contained in the transformation matrix that is specified by '-trans'. The input image must be either one of the following two types: Example:

vdotrans -in file2D.v -out file3D.v -trans transmatrix.v

The registration accuracy can be checked by applying the transformation to 2D anatomical slices, and comparing the resulting image with the reference image. Now click onto several easily identifiable landmarks and check whether they match in the two images.

Example:

vlview -in /home/newbdb/024/mr024_t1_pl.v file3D.v

If the result is not satisfactory, then redo 'vreg3d' using different parameters.


Parameters of 'vdotrans':
-help
Prints usage information.
-in
Input file. Default: (none)
-out
Output file. Default: (none)
-trans
File containing transformation matrix. Required.
-resolution
Output voxel resolution in mm. Default: 1
-type [ trilinear | NN ]
Type of interpolation, trilinear or nearest neighbor. Default: trilinear
-object [ anat | zmap | epi_t1 | all ]
Select object(s) to be transformed. Default: all


Max Planck Institute for Human Cognitive and Brain Sciences. Further Information: lipsia@cbs.mpg.de
Copyright © 2007 Max Planck Institute for Human Cognitive and Brain Sciences. All rights reserved.