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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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Thanks Fred,
I don't do any slice time correct and I do a lot of preprocessing of the resp and card signals.
I make my own trig for the card and smooth the resp a lot first. I did check the phase file outputs of each and they look
good.
So, I think you're right that the FFT might not be sensitive enough....I'll have to read the original paper, as I recall, they
used F
by
danielcuneo
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AFNI Message Board
Hi again
Now that I've gotten the 3dretoricor plugin to work, I have not seen the effect of the processing...
Hopefully someone can help me get better results....I'm not sure what information I should provide, so
please advise me of what you'd like to know.
I tested the pre and post physio correction using FFT via welch's method in python.
The spectrum's of th
by
danielcuneo
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AFNI Message Board
Well I fixed it myself....
It turns out, that I had not set both the slice_duration and the Pixdim4 entries correctly.
For those who may care:
Pixdim4 = <value in SECONDS not ms >
slice_dim=3
slice_duratiion=< dim3 / TR in SECONDS not ms>
Cheers all
by
danielcuneo
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AFNI Message Board
Hi All
I have 3dretroicor working with both resp and card data, as long as the 4D data set is in the original dimensions.
When I upsample or downsample isotropically ( 4 or 5mm using flirt ), retroicor throws the error:
*** Error transforming resp data
I diffed the headers and can't understand why non-time dimension inforamtion should make any difference.
My data sets are fMRI 4
by
danielcuneo
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AFNI Message Board