Much of SPM was written before NIfTI was invented. We simply haven't
had the chance to fully incorporate the full range of NIfTI-specific
changes into the code. SPM never actually reads NIfTI fields for time
step sizes, ascending/descending/interleaved information etc, as there
does not seem to be a reliable way of extracting it from the original
DICOM.
Best regards,
-John
On 24 July 2013 01:36, Sina Ghiassian <[log in to unmask]> wrote:
> Hi,
>
> I've recently found out that after the preprocessing steps of Realignment,
> Normalizing and Smoothing with SPM in MATLAB, nii.hdr.dime.pixdim(5) is
> automatically set to zero. Why is that happening? Is that a bug in SPM8?
>
> Thanks,
> Sina
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