VDWs are normalized resampled diffusion weighted image files created from DMR files, comparable to VTCs of FMR files for functional data.
For content-related questions about diffusion weighted data, please consult the DTI guide on the wiki at http://wiki.brainvoyager.com/DTI_in_BVQX .
The table below indicated the parameters that can be used for the commands to create VDW files.
Description |
Argument type |
Values and type |
Required for |
|
|
|
|
Name of DMR file |
String |
"xxx.dmr" |
Always |
Name of initial alignment file |
String |
"*_IA.trf" |
Always |
Name of fine alignment file |
String |
"*_FA.trf" |
Always |
Name of AC-PC alignment file |
String |
"*_ACPC.trf" |
Only for: CreateVDWInACPCSpace() CreateVDWInTALSpace() |
Name of Talairach landmarks file |
String |
"*.tal" |
Only for: CreateVDWInTALSpace() |
Name of resulting VDW file |
String |
"xxx.vdw" |
Always |
Resolution |
Number |
1 = 1 x 1 x 1 2 = 2 x 2 x 2 3 = 3 x 3 x 3 |
Always |
Interpolation method |
Number |
0 = nearest neighbour 1 = trilinear 2 = SINC |
Always |
Bounding box intensity threshold |
Number |
Between 0 and 225 |
Always |
Although the argument type is indicated, variables always have to be declared with the keyword var; example:
var interpolationmethod = 2;
See the following topics: