Hello,
we have some troubles with the realign&unwarp routines used in SPM2 (last
available package). So we try to understand the code
- apparently, the phase encode direction is considered as Y and deformation
field and jacobian are calculated for this direction.
Then, the defaults.realign.write.wrap value to indicate the
direction of the deformation should be always set to [0 1 0]
Is this correct ?
- How the static field values,if provided, are used during the estimation of partial
derivatives of EPI deformation fields (spm_uw_estimate) ? It seems that there
are only applied for the final calculation of images deformation
(spm_get_image_def). is this right ?
-what does the comment "the possibility to include measured field-map
temporally removed" in spm_realigned_ui exactly mean ?
Many thanks for your help
Michel
--
Michel Dojat
Unité mixte INSERM-UJF U594 "Neuroimagerie Fonctionnelle & Métabolique"
CHU de Grenoble - Pavillon B
BP 217
38043 Grenoble Cedex 9
Phone: 33 4 76 76 57 48 (secr.) / 33 4 76 76 88 97 (direct)
Fax: 33 4 76 76 58 96
TIMC lab: 33 4 56 52 00 69
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http://www-u594.ujf-grenoble.fr/people/mdojat/index.html
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