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  

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May 05, 2005 10:33AM
Hi there,

I have a subject, for a valid reason, whose scans have to be done in oblique instead of typical axial. And here are the coord. for the structural and functional scans.

structural:
First slice: R6.5, A26.9, I85.4
Final slice: R6.5, P22.2, S79.7

functional:
First slice: R6.5, P21.8, S54.1
Final slice: R6.5, A18.3, I74.8

Oblique angle: 287 (17 degrees from horizonal)

If they were scanned in axial, the second column(anterior-posterior) should be the same between the first slice and the final slice.

My problem is that I cannot think of a way to properly reformat my raw data (GE for anat. and spiral P files for func.) into .HEAD and .BRIK files.

For example, to do the reformatting, I would use the commands below.

structural:
> to3d -anat -skip_outliers -session ../afdir/ -prefix 3dvol -xFOV 116.5R-103.5L -yFOV ###P-###A -zSLAB ###I-###S ‘I.???’

functional:
> count -digits 3 -root 3D:0:0:64:64:1:P123456.7. 1 9490 | to3d -epan -session ../afdir -prefix run1 –anatparent ../afdir/3dvol+orig -xFOV 106.5R-93.5L -yFOV ###A-###P -zSLAB ###S-###I -time:tz 177 28 2000 seq+z -@

### represents the entries that I am not sure about.

I believe that 3drotate and imrotate and rotobrick are some of the methods to deal with oblique scans.

But my problem is that I am not too sure how to ceate a .HEAD and .BRIK files from my raw data in the first place (like what numbers should be in those ### entries), it's difficult for me to proceed further.

Thanks very much for your help. I really appreciate for your kind assistance.

Ricky
Subject Author Posted

Oblique anat and func scans

Ricky Tong May 05, 2005 10:33AM

Re: Oblique anat and func scans

Fred Tam May 07, 2005 12:23AM

Re: Oblique anat and func scans

Ricky Tong May 10, 2005 09:54AM