help > dcm2nii with diffusion images - dwell time?
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Jan 26, 2016 06:01 PM | Noor Al-Sharif
dcm2nii with diffusion images - dwell time?
Hi,
How can I verify where the information for dwell time & phase direction are coming from in a DWI nifti? I'm trying to find the relevant information in the DICOMs but haven't come up with anything yet. How are those two values determined?
Thanks,
Noor
How can I verify where the information for dwell time & phase direction are coming from in a DWI nifti? I'm trying to find the relevant information in the DICOMs but haven't come up with anything yet. How are those two values determined?
Thanks,
Noor
Feb 1, 2016 07:02 PM | Chris Rorden
RE: dcm2nii with diffusion images - dwell time?
I tend to prefer the more modern dcm2niix (which comes with
MRIcroGL) over the mature but legacy dcm2nii (which comes with
MRIcron). For Siemens, the dwell time into the "description" of the
header - you can view this with any tool that reports the NIfTI
header, for example fslhd:
descrip TE=30;Time=140000.990;phase=1;dwell=0.280
For Siemens, the information required to compute dwell time is not in the standard DICOM tags, but is hidden in the proprietary CSA header. For details see the dcm2niix source code, in particular readCSAImageHeader
https://github.com/neurolabusc/dcm2niix/...
descrip TE=30;Time=140000.990;phase=1;dwell=0.280
For Siemens, the information required to compute dwell time is not in the standard DICOM tags, but is hidden in the proprietary CSA header. For details see the dcm2niix source code, in particular readCSAImageHeader
https://github.com/neurolabusc/dcm2niix/...