Old versions of mri_convert (before 6.0) used to output a default Siemens gradient table - this was not read from the header of the dicom file itself. The 6.0 version reads the table from the header, as long as it is a relatively modern dicom file that has the table in a standard position in the header. When/where was your data acquired?
________________________________ From: freesurfer-boun...@nmr.mgh.harvard.edu [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Warner, Graham Cary [gwar...@mgh.harvard.edu] Sent: Wednesday, February 08, 2017 1:21 PM To: Freesurfer support list Subject: Re: [Freesurfer] dcm2niix I just tried it on a few and while it was able to generate the nii files it failed to generate the bval/bvec files I'm looking for. Is it not typical behavior for mri_convert to generate bval/bvec files for DTI runs or is this an error? Graham ________________________________ From: freesurfer-boun...@nmr.mgh.harvard.edu [freesurfer-boun...@nmr.mgh.harvard.edu] on behalf of Yendiki, Anastasia [ayend...@mgh.harvard.edu] Sent: Wednesday, February 08, 2017 10:15 AM To: Freesurfer support list Subject: Re: [Freesurfer] dcm2niix Hi Graham – Have you tried mri_convert? The 6.0 version should be able to extract diffusion gradient tables and b-value tables from most standard recent dicoms. a.y From: <freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>> on behalf of "Warner, Graham Cary" <gwar...@mgh.harvard.edu<mailto:gwar...@mgh.harvard.edu>> Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>> Date: Wednesday, February 8, 2017 at 10:01 AM To: "freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>" <freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>> Subject: [Freesurfer] dcm2niix Hi all, Can we get dcm2niix added to the system instance of fsl? It can't find it in 5.0.7 or 5.0.9 (please let me know if it is somewhere else and I'm just not seeing it). I'm having problems generating .bval and .bvec files from certain DTI datasets using dcm2nii and the NITRC guys told me I should be using dcm2niix. Thanks, Graham
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