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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April 03, 2009 09:02PM
Looking at Picture2:

The EPI is upside down. This indicates that for whatever reason, it's z-axis encoded as I-S, 82.2mm S to 177.2mm S, is backwards. The SPGR is displayed as AFNI should show them (of course, the L-R distinction is hard to tell from here, but looks OK since the R hemisphere goes anterior a little more than the left, and the L hemisphere goes a little farther posterior than the right, as is common among us Homo Sapiens types).

You can either try to figure out why the EPI is upside down and shifted off to lie entirely in the Superior half of the world, or you can fix it after its creation via to3d. You can fix it with the program '3drefit', using with the option '-orient RAS'. The directions of the coordinates may be OK then, but it is likely the location in space will not overlap the anatomy well. Depending on how badly they don't line up, you might have to take further steps, such as using the @Align_Centers script for crude registration and/or the align_epi_anat.py script for fine registration of EPI to SPGR.

Did you create this EPI dataset using Rick Reynold's DIMON program? If that will work for you, it's the best approach. However, we don't have a lot of experience with Philips DICOM files, so perhaps there are some problems we aren't familiar with.

Finally, I see that you are using a Mac. I thought Taiwan was a PC-only land. Did you smuggle this computer into the island?
Subject Author Posted

help with Philip 1.5T FEF data

chun-chia April 03, 2009 07:15AM

Re: help with Philip 1.5T FEF data

Bob Cox April 03, 2009 08:45AM

Re: help with Philip 1.5T FEF data

chun-chia April 03, 2009 08:02PM

Re: help with Philip 1.5T FEF data

bob cox April 03, 2009 09:02PM

Re: help with Philip 1.5T FEF data

chun-chia April 04, 2009 01:06PM