I've been attempting to replicate the method but in a slightly blind way - I
ran concat-ICA, found the component of interest, extracted out the column
from melodic-mix and split it up into 40 timeseries (1 per subject). I then
ran each subject through Feat using the extracted timeseries and got
reasonable looking (?!) results in ~90% of the subjects. On a group-level,
we also got predictable results (similar to our standard task fMRI results).
On a scale of 1 to 10, how invalid is this approach?
All the best,
Jonathan
On Tue, 7 Jul 2009 20:19:34 +0100, Steve Smith <[log in to unmask]> wrote:
>Hi - the Concat-ICA + dual-regression approach (as used in the
>Filippini PNAS paper) was presented in brief in an OHBM abstract this
>year (first author Beckmann). A paper is in production, and we will
>be releasing the script to do this for beta-testing very soon. If you
>like we can put you on the list for people to contact as beta-testers.
>
>Cheers.
>
>
>
>On 6 Jul 2009, at 17:55, Srinivas Rachakonda wrote:
>
>> Hi,
>>
>> Where can I get the reference to dual regression scheme as mentioned
>> in "Distinct patterns of brain activity in young carriers of the
>> APOE-ε4 allele" paper?
>>
>> Thanks,
>> Srinivas
>
>
>---------------------------------------------------------------------------
>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)
>[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
>---------------------------------------------------------------------------
|