Hi, I am recently got myself into NiFTi file format and trying to understand how to use it. Main question from me is how to add more variables to NifTi file? I read some materials but, I am not sure what to do. For example, I have 4D vectors(x,y,z,t) to add. I know what to change in a header file and where to add those vector information, in the case of a single file (.nii) I would put those between the header and image information. However, I couldn't figure out how to put them, as well as how to construct data format.  It would be thankful if someone give me any hint. Thanks in advance.

Namheon