Hi The 15min runs can be concatenated in order to get one hour's worth of data from a given subject - that is the simplest way to combine the datasets in order to make the most of the full data.
You can of course just work with a single 15min run for a given subject - but I would say that that would not be "making the most of" the full potential of the full data. There is also the subtler point that combining LR and RL phase-encoding direction datasets should help ameliorate left-right asymmetric differences possibly present in single 15min runs. Cheers, Steve. On 26 Oct 2014, at 01:19, Nomi, Jason <[email protected]> wrote: > > Dear Experts, > > I have a follow up question regarding this earlier thread about > Fix-preprocessed rs-fMRI data. > http://www.mail-archive.com/[email protected]/msg00596.html > > There are 4 runs for the fix data each consisting of a 15 minute resting > state .nii volume file: > Rest1: LR > Rest1: RL > Rest2: LR > Rest2: RL > > From the earlier thread it seems like all 4 runs should be concatenated? In > other words, I should combine all 4 15 minute runs into a single 60 minute > run? Or, should I merge them to make a single 15 minute run? > > I do not understand what to do with the 4 runs. > > There is a PNAS paper where they simply chose one of the 15 minute runs > (Rest2: LR): http://www.pnas.org/content/111/28/10341.full.pdf > > > Is this acceptable? Or, is it absolutely necessary to > combine/concatenate/merge (I don't know what the proper term/operation is > here!) the 4 runs? > > best, > Jason > _______________________________________________ > HCP-Users mailing list > [email protected] > http://lists.humanconnectome.org/mailman/listinfo/hcp-users --------------------------------------------------------------------------- Stephen M. Smith, Professor of Biomedical Engineering Associate Director, 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 --------------------------------------------------------------------------- Stop the cultural destruction of Tibet _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
