oops - the dangers of type-ahead. Replied to the wrong message :)
sorry,
Bruce
On Mon, 28
Aug 2006, Bryon Adinoff wrote:
> On Aug 28, 2006, at 12:59 AM, Steve Smith wrote:
>
> Hi,
>
> On 27 Aug 2006, at 19:50, Jennifer Bramen wrote:
>
>> Hi Again,
>>
>> I have been having a lot of trouble with outside of the brain activation. I
>> think that what is
>> happening is the brains get larger after smoothing, so activations spread
>> outward. I find it
>> somwhat improved on the group analysis if I substitute the mask in the
>> first level directory for one
>> generated by an unsmoothed image.
>
> If it's the group-level results that you are concerned about then yes, this
> is the best solution, of the ones you propose. You definitely don't want to
> use the blurred/expanded functional data as input to the registration.
>
> Cheers, Steve.
>
>>
>> What is the best solution to this? Should I run registration on the
>> smoothed images instead? I
>> could run my preprocessing first then select the filtered_func instead of
>> the raw input. I find this
>> problem is also reduced greatly by doing this.
>
>
> ---------------------------------------------------------------------------
> 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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