Thanks Matt and Jenn for your prompt replies.
-Ben
On Tue, Aug 22, 2017 at 7:55 AM, Elam, Jennifer <e...@wustl.edu> wrote:
> 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
> e...@wustl.edu
> www.humanconnectome.org
>
> ------------------------------
> *From:* hcp-users-boun...@humanconnectome.org <hcp-users-bounces@
> 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> on behalf of Ben Turner <
> neurobo...@gmail.com>
> Date: Monday, August 21, 2017 at 7:29 PM
> To: "hcp-users@humanconnectome.org" <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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