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open-discussion > BVECS and BVALS
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Feb 23, 2022 04:02 PM | randall walden - uab
BVECS and BVALS
Good morning,
I am currently running into a problem with the generation of the BVALS and BVECS files associated with a set of dcm images. Perhaps i am a tad misguided but i was under the impression that the bash call:
dcm2niix -f %p ASSOCIATED_DIR_OF_DCM
created those files. i have used a similar function call with AXIAL_dti analysis and the associated bvals and bvecs files are created.
I am currently running into a problem with the generation of the BVALS and BVECS files associated with a set of dcm images. Perhaps i am a tad misguided but i was under the impression that the bash call:
dcm2niix -f %p ASSOCIATED_DIR_OF_DCM
created those files. i have used a similar function call with AXIAL_dti analysis and the associated bvals and bvecs files are created.
Feb 24, 2022 05:02 PM | Chris Rorden
RE: BVECS and BVALS
dcm2niix will generate bvec/bval files if they are specified in the
DICOM images. It should automatically work for Philips, GE,
Siemens, Canon and UIH images. I would make sure you are using the
latest stable release (currently v1.0.20211006).
Typically if these files are not generated, it is because you are converting a derived DWI image (e.g. TRACE, ADC, MD, etc) rather than raw diffusion data. You need raw directional diffusion scans for bvec/bval files.
Typically if these files are not generated, it is because you are converting a derived DWI image (e.g. TRACE, ADC, MD, etc) rather than raw diffusion data. You need raw directional diffusion scans for bvec/bval files.