Dear List,
I have not yet been able to find an explanation to this (I have searched
the list and bug reports):
For every subject I have checked in the 100 "unrelated" dataset, there
are only 1187 trigger "up" sections in the physio log file (but 1200
rs-fMRI volumes). However, the temporal length of the physio logs is, as
expected, 1200 x TR.
All physio logs I have looked at end like in the attached picture -
there are about 10 seconds of 0's.
Could anyone help in figuring out which way the misalignment went?
Thanks a lot in advance!
Nicola
Inline image 1
________________________________________________________________
Prof. Nicola Toschi
Associate Professor in Medical Physics
Medical Physics Section, Department of Biomedicine and Prevention
Faculty of Medicine, University of Rome "Tor Vergata"
Via Montpellier 1 - 00133 Rome, Italy
[email protected]
Visiting Assistant Professor in Radiology, Assistant in Neurology
Athinoula A. Martinos Center for Biomedical Imaging, Department of
Radiology
Harvard Medical School
149 Thirteenth Street, Suite 2301, Charlestown, MA 02129
[email protected]
-------- Forwarded Message --------
Subject: Re: [HCP-Users] 13-volume mismatch between rsfMRI volumes and
trigger file?
Date: Thu, 14 May 2015 22:59:52 +0200
From: Nicola Toschi <[email protected]>
To: Glasser, Matthew <[email protected]>,
[email protected] <[email protected]>
Hi,
thanks for your quick reply.
I had noticed a bug report (also mentioned in the wiki), but a) it
refers to a 1 or 1.5 second mismatch (not 13 volumes i.e. roughly 10
seconds), b) the wiki says that the files have been realigned.
https://www.mail-archive.com/hcp-users%40humanconnectome.org/msg00217.html
Any pointers are much appreciated!
Thanks a lot - Nicola
On 05/14/2015 10:52 PM, Glasser, Matthew wrote:
I believe there has been a reported bug in this, so have a search of the
mailing list archive for it.
Peace,
Matt.
On 5/14/15, 3:48 PM, "Nicola Toschi" <[email protected]> wrote:
Dear HCP Staff,
I have been looking at the trigger logs (column 1 of the *Physio_log.txt
files) in rsfMRI data (both sessions) for the 100 unrelated subjects.
While the total temporal length of the physio logs matches the total
length of the fMRI data (1200 * TR), in all physio logs I consistently
found 1187 (instead of 1200) triggers (i.e. sections with consecutive
1's).
Could there be a 13 - volume shift? Or am I missing something (more
likely)?
Thanks in advance!
Nicola
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