open-discussion
open-discussion > RE: Dicom bold images misalignment？
Apr 21, 2020 02:04 PM | Paul Camacho - University of Illinois at Urbana-Champaign
RE: Dicom bold images misalignment？
It looks like the origin of the images
has been translated some 20 to 30% in the anterior
direction. I'm sure someone has a better fix for this issue,
but these are the troubleshooting steps I would look at
first.
Does this translation persist when you convert the raw DICOMs to NIFTI files? If so, then you might want to check the DICOM headers (I use AFNI's dicom_hdr command line tool). Are the origin points in the DICOM headers for your BOLD and DTI images consistent with those of your T1w images? If they do not appear to be consistent, you can try adjusting the relevant DICOM tags (https://www.dicomlibrary.com/dicom/dicom...) by whatever the common difference is or use the SPM reorient GUI to manually set new origin points based on the anterior commissure and perform a translation.
Best of luck!
Originally posted by Yun Tian:
Does this translation persist when you convert the raw DICOMs to NIFTI files? If so, then you might want to check the DICOM headers (I use AFNI's dicom_hdr command line tool). Are the origin points in the DICOM headers for your BOLD and DTI images consistent with those of your T1w images? If they do not appear to be consistent, you can try adjusting the relevant DICOM tags (https://www.dicomlibrary.com/dicom/dicom...) by whatever the common difference is or use the SPM reorient GUI to manually set new origin points based on the anterior commissure and perform a translation.
Best of luck!
Originally posted by Yun Tian:
There are dozens of subjects (focused on the
early stage of the project) that appears "misaligned" in the raw
bold images and dti images, but there is no problem in T1-weighted
images obtained at the same time. The scanner is Siemens 3-T
prism.
I attach a bold image screenshot. I don't know how to describe this problem, 'misalignment'? The brain image that should be at the top seems to appear at the bottom.
Is there any body knows how to fix this issue? Extremely grateful!
I attach a bold image screenshot. I don't know how to describe this problem, 'misalignment'? The brain image that should be at the top seems to appear at the bottom.
Is there any body knows how to fix this issue? Extremely grateful!
Threaded View
| Title | Author | Date |
|---|---|---|
| Yun Tian | Apr 21, 2020 | |
| Paul Camacho | Apr 21, 2020 | |
| Mehran Azimbagirad | Apr 21, 2020 | |
| Alex Dresner | Apr 21, 2020 | |