I am trying to use FLIRT to align a very limited set of slices with a
3d T1 volume. I have tried it following the instructions for limited-z
datasetson the website, as well as with more standard techniques, and
they both give me the same incorrect results.
What I have:
A functional timeseries of three oblique (mostly coronal, rotated
slightly toward axial) 3mm/0 skip slices
An anatomical EPI set of 16 slices, including the three in the above set
A T1 3d volume taken on a different day
When I do FLIRT with timeseries--(3 DOF)-->anatomical--(12
DOF)-->volume, the end result has the correct rotation, but is not in
the correct place. Aligning the anatomical alone to the volume with 12
DOF is similar--it is rotated correctly, but placed incorrectly. It's
about 1-2 cm too anterior.
I've also tried this with the ventricles weighted, with no change in
results.
Can anyone offer a suggestion?
Richard Albistegui-DuBois
UCLA Brain Mapping
660 Charles Young Drive South, Room 237
(310) 206-4456 phone
(310) 794-7406 fax
[log in to unmask]
AIM: dubistegui
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