To expand on the smoothing issue a bit, even 4mm FWHM spatial smoothing in
the volume causes substantial signal mixing between areas on opposite sides
of sulci, which sounds like a particularly bad idea for ICA. As I
understand it, group ICA shouldn't care much about spatial noise,
especially when
There are few circumstances that one should do unconstrained smoothing in
the volume.
Peace,
Matt.
On 1/3/18, 12:53 PM, "hcp-users-boun...@humanconnectome.org on behalf of
Tobias Bachmann" wrote:
>Hi Stephen,
>
>Am Mittwoch, 3. Januar 2018, 16:02:06 CET schrieb Stephen Smith:
>> > On 3 Jan 2
Hi Stephen,
Am Mittwoch, 3. Januar 2018, 16:02:06 CET schrieb Stephen Smith:
> > On 3 Jan 2018, at 14:44, Tobias Bachmann
> > wrote:
> > when using the HCP's ICA+FIX data (NIfTI volume files) for a rather simple
> > group ICA, would you recommend further conventional preprocessing, i.e.
> >
> >
tobias.bachm...@studserv.uni-leipzig.de>>
Cc: "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>"
mailto:hcp-users@humanconnectome.org>>
Subject: Re: [HCP-Users] Smoothing, discarding volumes
Hi
On 3 Jan 2018, at 14:44, Tobias Bachmann
mailto:tobias.b
Hi
> On 3 Jan 2018, at 14:44, Tobias Bachmann
> wrote:
>
> Dear all,
>
> when using the HCP's ICA+FIX data (NIfTI volume files) for a rather simple
> group ICA, would you recommend further conventional preprocessing, i.e.
>
> 1. smoothing (about which conflicting info is to be found)
spati
Dear all,
when using the HCP's ICA+FIX data (NIfTI volume files) for a rather simple
group ICA, would you recommend further conventional preprocessing, i.e.
1. smoothing (about which conflicting info is to be found)
2. discarding the first few volumes (I found hardly anything regarding this
iss
