questions > DTI vector transformation
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Sep 17, 2019 02:09 PM | Yaron Caspi
DTI vector transformation
What formula does dcm2niix uses when producing a bvec file for a
DTI scan in cases there is an angulation in the dicom files i.e.,
tag (0020,0037), Image Orientation (Patient), exhibit some
transformation different from the identity matrix?
Does the values just read from the Dicom header, or does dcm2niix rotate the values from the dicom header according to some formula so that they will fit the oriantation that is in the nifti file?
If the last is the correct state, what formula does dcm2niix uses?
Yaron Caspi
Does the values just read from the Dicom header, or does dcm2niix rotate the values from the dicom header according to some formula so that they will fit the oriantation that is in the nifti file?
If the last is the correct state, what formula does dcm2niix uses?
Yaron Caspi
Sep 17, 2019 02:09 PM | Chris Rorden
RE: DTI vector transformation
Depends on the vendor. For GE the gradients are in MR
physics coordinates - look at the function geCorrectBvecs().
For UIH, Bruker, Hitachi Siemens or Philips look at the
function siemensPhilipsCorrectBvecs().
https://github.com/rordenlab/dcm2niix/tr...
https://github.com/rordenlab/dcm2niix/tr...
https://github.com/rordenlab/dcm2niix/tr...
https://github.com/rordenlab/dcm2niix/tr...
https://github.com/rordenlab/dcm2niix/tr...
https://github.com/rordenlab/dcm2niix/tr...