AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

Previous Message Next Message
Message List New Topic Print View
|
rick reynolds
February 15, 2008 09:40PM
Hi Brad,

1. It "rounds" to the nearest cardinal transform.

2. 3dWarp can be used to either apply the warp of a given
dataset (via -oblique2card), or apply the inverse warp of a
given dataset to a different dataset (see -oblique_parent),
e.g. apply the inverse warp of the EPI dataset to register
the anat to the EPI, so that the EPI does not need to be
interpolated.

3. See #2. The only other application is to have programs
whine at you if you change it (such as running 3dresample
on an oblique dataset, which invalidates the transform).

4. No. Warp underlay can be used either to resample it based
on the Define Datamode controls, or to apply an ACPC or TLRC
transform to a dataset that has none.

So anyway, if you want to deal with oblique data, do it via
3dWarp. The -help output has examples under "Sample usages".

Please let us know if you have any questions about that.

- rick

Reply Quote
RSS
Subject Author Posted

sform, obliquity, IJK_TO_DICOM_REAL

Brad Buchsbaum February 15, 2008 06:51PM

Re: sform, obliquity, IJK_TO_DICOM_REAL

rick reynolds February 15, 2008 09:40PM