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help > Can't find frequency direction in NIFTI header
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Nov 15, 2018 04:11 PM | Aras K
Can't find frequency direction in NIFTI header
Dear all,
I am running the fBIRN QA pipeline version 1.10.7-lsb30.x86_64 with AFNI version AFNI_2011_12_21_1014. I have NIFTI fmri images and I convert them to BXH/XCEDE using analyze2bxh --xcede. This is followed by running the fBIRN QA pipeline on the BXH/XCEDE data files using fmriqa_phantomqa.pl.
The fBIRN QA pipeline fails to generate ghost measures with the following error:
"volnum ghostpercentage brightghostpercentageCan't find frequency direction in header! Not calculating ghost metrics (not EPI?)"
It appears that the pipeline cannot find the information pertaining to frequency/phase-encode directions in the NIFTI header. I tried to manually modify the NIFTI header by adding the field 'dim_info' but it did not resolve the issue. Any suggestion pertaining to a solution?
Thanks,
Aras
I am running the fBIRN QA pipeline version 1.10.7-lsb30.x86_64 with AFNI version AFNI_2011_12_21_1014. I have NIFTI fmri images and I convert them to BXH/XCEDE using analyze2bxh --xcede. This is followed by running the fBIRN QA pipeline on the BXH/XCEDE data files using fmriqa_phantomqa.pl.
The fBIRN QA pipeline fails to generate ghost measures with the following error:
"volnum ghostpercentage brightghostpercentageCan't find frequency direction in header! Not calculating ghost metrics (not EPI?)"
It appears that the pipeline cannot find the information pertaining to frequency/phase-encode directions in the NIFTI header. I tried to manually modify the NIFTI header by adding the field 'dim_info' but it did not resolve the issue. Any suggestion pertaining to a solution?
Thanks,
Aras