Hi,
You'd probably want to use example_func and a same session highres_anat
for registration purposes (registering example_func to highres, say with
7 DOF, if it's same session might want to set sarch to no_search, and
highres to standard with 12 DOF).
AFNI starts generally counting at zero, but your problem is more likely
the "ignore" option under FIM in the graph window that's causing a
little confusion, just set that to the min and your time courses should
be fine.
H.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On
Behalf Of Andrew Bleicher
Sent: Tuesday, June 03, 2003 12:58 PM
To: [log in to unmask]
Subject: Re: [FSL] more on ICA-displaying MELODIC results
Hi,
Thank you both very much for your quick replies. I have tried both
methods, which provided similar results. However, I have come to realize
that MELODIC does not include a registration step so that the functional
data are not registered to standard space or to a high resolution image.
As such, I tried to run the FLIRT GUI to register the thresh_zstat*.img
to a high resolution image, but the results were not to my liking.
Perhaps there is some other way that I ought to be approaching this
problem.
While on the subject of AFNI, I have unable to use certain tools such as
calculating % change and using AFNI's Talairach coordinate system with
my FEAT output. Also, when constructing timecourse graphs, AFNI uses
time instead of volumes to label its x axis. This has caused my graphs
of signal timecourse to be shifted in time to the left, so that
responses "anticipate" the stimulus. I am not sure why this happens, and
I have had difficulty quantifying the degree of "anticipation" to
correct the labels I add to these graphs afterwards.
I understand that these are AFNI questions as much as FSL questions, but
I would appreciate any help that is offered. I had hoped that the newest
version of AFNI might have made these steps easier, but it hasn't.
Thank you again,
Andrew Bleicher, MD
Resident
Department of Radiology
Montefiore Medical Center
Albert Einstein College of Medicine
Bronx, New York
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