I have ANALYZE MRI volumes from CURRY that have current density, which are
values < 1. The HDR has "calibration scaling" set. When I use fslhd, or
fslmaths, or fslmerge, with these files, it appears to not read the
calibration scaling. ANALYZE/NIFTII has a calibration intercept and
scale that is supposed to be applied to the store values. MRICRON reads
these files correctly, shows the calibration scaling, and has voxel values
with the scaling. If I use:
Fslmaths inputfile.hdr -add 0 outputfile.nii.gz, then the scaling factor
is not read; the fslstats -M reports a value that appears to be about
x*scale, and when I view this in MRICron the individual voxels in the
input file, * scale, are what are shown in the output file.
So it appears the fsl utils are not reading the calibration scale.
Any help?
John
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John E. Richards
Carolina Distinguished Professor
Department of Psychology
University of South Carolina
Columbia, SC 29208
Dept Phone: 803 777 2079
Fax: 803 777 9558
Email: [log in to unmask]
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HTTP: jerlab.psych.sc.edu
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