Osprey with NIFTI

MRS Software Osprey
1

Hi

I just wanted to raise an issue that I encountered with Osprey when using nifti file.

When I use nifti-mrs files (converted using spec2nii), Osprey fails with this error:
image

Obviously because the geometry does not have the “pos” field.
image

But when I change the input files in the jobfile to DICOM folders then the error goes away since now the geometry has the “pos” field.

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I was wondering if this is a bug? If yes, should it be fixed in spec2nii or in the Osprey?
Why nifti-mrs does not save the pos information?

The data if from Siemens Scanner (7T-Terra)

Thanks
Shah

2

Hi Shah,

thanks for flagging this. The function appears to crash when it’s trying to write out a ‘vendor-native’ version of the data, which you can deactivate in the job file by setting opts.saveVendor = 0.

I think this function might be difficult to really uphold if the source data are NIfTI-MRS since we’d need to write back the NIfTI-style coordinates into the Siemens-RDA-style formalism… and that transformation will be a bit of a headscratcher.

Cheers,
Georg

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