table of contents
LIPSIA     Analyses of activation areas (ROIs)
vmaskave, vmaskedit
In some cases, the resulting contrast images need to be subjected to further post hoc analyses. Specifically, one may want to test whether the activation strength in 'regions of interest' (ROIs) differs between hemispheres and/or conditions or is influenced by some other factors.

The following steps must be performed:

Parameters of 'vmaskave':
-help
Prints usage information.
-in
Input file. Default: (none)
-mask
File containing blob image. Required.
-id
Blob id (use 0 to specify all blobs). Default: 0
-report
File containing output report. Default:
-verbose [ true | false ]
Whether to report t-test results. Default: false
Parameters of 'vmaskedit':
-help
Prints usage information.
-in
ASCII file containing list of coordinates. Required.
-out
Output file. Default: (none)
-system [ mm | talairach | mni ]
Type of coordinate system. Default: talairach.
-resolution
voxel size in mm. Default: 1
-nslices
number of slices in output image. Default: 0
-nrows
number of rows in output image. Default: 0
-ncolumns
number of columns in output image. Default: 0
Literature:
Bosch, V. (2000). "Statistical Analysis of Multi-Subject fMRI Data: Assessment of Focal Activations." Journal of Magnetic Resonance Imaging, 11(1), 61-64.


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.