Hi Ranjan,
Actually, that is the correct result. According to the NIFTI
standard, the 4th dimension is strictly for time. Your 'func'
dataset is not a time series, so using the 5th dimension is
correct. It is the reading software that is not interpreting
it correctly. You should let them know.
If you want to (incorrectly) force that to be a 4-dimensional
dataset, use 3dTcat.
3dTcat -prefix func_REML_D4.nii rall_func_REML+orig
- rick