Just as an FYI, we also recently encountered the same problem, also
using mri_convert as our DICOM to NIFTI converter.  Our work-around was
to just switch to dcm2nii.  

Jolinda: I don't know why mri_convert is populating a "slice_code" entry
for a Siemens MPRAGE acquisition, since an MPRAGE is a 3D acquisition in
k-space and it doesn't have a "slice timing pattern".  

That said, since the entry is irrelevant for an MPRAGE, and I agree that
it shouldn't cause FS to abend.

cheers,
-MH

On Thu, 2011-06-16 at 21:56 -0700, Louie Perkins wrote:
> We recently ran into an issue with Freesurfer's mri_convert tool where it 
> gives an error of "unsupported slice timing pattern".  We have some NIFTI 
> MPRAGE files that have a "slice_code" with a value of NIFTI_SLICE_ALT_INC2 
> (=5).
> 
> Issue arises in utils/mriio.c (line 9549 of rev:stable5), two slice_code 
> possibilities are not included in the if-statement, NIFTI_SLICE_ALT_INC2 and 
> NIFTI_SLICE_ALT_DEC2. These are defined in include/nifti1.h (comment says 
> they were added in 2005), so I'm checking to see if there is a reason they 
> are not allowed, or if this bit of code was just never updated to reflect the 
> latest nifti1.h.
> 
> Thanks for any help,
> -Louie Perkins
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