Hi Ben,

While bearing Matt's response in mind for your analysis, I believe the S500 
release cross-run analyzed task volume data is still available on Amazon S3 in 
the HCP/{SubjectID}/MNINonLinear/Results/{tfMRI_TASK} directories. If you 
haven't accessed HCP data on S3 before, see this page for setup instructions:

https://wiki.humanconnectome.org/display/PublicData/How+To+Connect+to+Connectome+Data+via+AWS


Best,

Jenn

Jennifer Elam, Ph.D.
Scientific Outreach, Human Connectome Project
Washington University School of Medicine
Department of Neuroscience, Box 8108
660 South Euclid Avenue
St. Louis, MO 63110
314-362-9387<tel:314-362-9387>
e...@wustl.edu<mailto:e...@wustl.edu>
www.humanconnectome.org<http://www.humanconnectome.org/>


________________________________
From: hcp-users-boun...@humanconnectome.org 
<hcp-users-boun...@humanconnectome.org> on behalf of Glasser, Matthew 
<glass...@wustl.edu>
Sent: Monday, August 21, 2017 7:53:16 PM
To: Ben Turner; hcp-users@humanconnectome.org
Subject: Re: [HCP-Users] Volumetric tfMRI data on ConnectomeDB

I suppose it would be reasonable to make unsmoothed individual subject volume 
data available, however that isn’t going to be high on the priority list given 
available resources.  In my opinion the smoothed volume data shouldn’t have 
been made available in the first place, because they were known at the time to 
be substantially worse than the surface-based data.

All that said, the volume timeseries are available and you can compute the 
volume analysis on your own to your own specifications.  It doesn’t take that 
long: e.g. I computed 3 versions of unsmoothed volumetric task fMRI data for 
the purpose of evaluating structured noise clean up effects (where it is 
helpful to also see what is going on in the white matter and CSF) in a couple 
of weeks on the S500 release on a modest 5 machine compute cluster.

It’s worth noting that unsmoothed volume data look quite dramatically different 
from smoothed data and indeed we are finding that it is the 4mm FWHM volume 
smoothing that is the worst offender (whereas the difference between unsmoothed 
volume data and surface is about the same magnitude as MSMSulc vs MSMAll) in 
terms of loss of spatial localization precision.  On the surface smoothing is 
more benign in small amounts, and 4mm FWHM only modestly reduces spatial 
localization accuracy.

Peace,

Matt.

From: 
<hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>>
 on behalf of Ben Turner <neurobo...@gmail.com<mailto:neurobo...@gmail.com>>
Date: Monday, August 21, 2017 at 7:29 PM
To: "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>" 
<hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>>
Subject: [HCP-Users] Volumetric tfMRI data on ConnectomeDB


Hello - I’m trying to get the volumetric cross-run analyzed task data that came 
with the original S500 release. I understand well the arguments for using a 
surface-based approach; however, I need the volume-based data for a very 
specific purpose. As far as I can tell, only the 2mm and 4mm grayordinate data 
are available currently through ConnectomeDB. Am I missing something? And if 
not, is there some other avenue through which I can get the volumetric data? 
Thanks.

-Ben Turner

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