Hi
> On 3 Jan 2018, at 14:44, Tobias Bachmann > <[email protected]> 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) spatial or temporal? The simple answer is in general no, although for the purposes of group-ICA only (and not any later subject-specific analyses like dual regression), it might be the case that some lowpass temporal filtering could boost effective CNR. > 2. discarding the first few volumes (I found hardly anything regarding this > issue)? For most purposes it's not necessary, though there are some slight residual starting effects in the data, so you could delete a few. Cheers. > > Kind regards, > Tobias Bachmann > > > _______________________________________________ > HCP-Users mailing list > [email protected] > http://lists.humanconnectome.org/mailman/listinfo/hcp-users --------------------------------------------------------------------------- Stephen M. Smith, Professor of Biomedical Engineering Head of Analysis, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [email protected] http://www.fmrib.ox.ac.uk/~steve <http://www.fmrib.ox.ac.uk/~steve> --------------------------------------------------------------------------- Stop the cultural destruction of Tibet <http://smithinks.net/> _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
