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

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rick reynolds
November 03, 2014 10:40AM
Hi Lz,

The extents mask restricts the result to only those
voxels that have data at every time point. This is
specifically because of motion, particularly when
combined with warping the result to a larger box.
At the edges, some voxels get time series that are
based on the motion. At such a voxel, some TRs have
valid data, some are identically zero, as they came
from outside the EPI box.

If volreg were an independent step, the extents mask
would not be so important.

- rick
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Subject Author Posted

Is Extents masking a necessary step?

lzhyoung October 29, 2014 10:46PM

Re: Is Extents masking a necessary step?

rick reynolds November 03, 2014 10:40AM