We have tried running within subject tbss for each subject and and a
baseline tbss. We combined the warps from the two, and it introduces a clear
bias of the baseline images. Our approach is now a paired t-test.
Arnold Skimminge
On Sun, 1 Feb 2009 13:51:02 +0000, Steve Smith <[log in to unmask]> wrote:
>The simplest thing to do is just to treat every input image like
>normal and then do (e.g.) a paired t-test in the final stats. If you
>wanted to (possibly) improve the registrations (it hasn't been tested
>whether this is worth the hassle) you could possibly feed in just one
>image per subject (or an average of all their images) into the
>registration stages and apply that to all that subject's timepoints.
>However this approach will mean you getting inside and editing the
>various TBSS scripts.
>
>
>
>
>On 1 Feb 2009, at 13:00, Eytan Raz wrote:
>
>> Dear FSL users,
>> is there any recommended TBSS procedure to analyse longitudinal data?
>>
>> Thank you
>>
>>
>> Eytan Raz, MD
>> Rome - Italy
>>
>
>
>---------------------------------------------------------------------------
>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
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