Hi:
But, How can I compute the intersection of two (first-level) activation
maps ?... Using which second-level processing options of FSL ?... I read
the FSL manuals, but I don't understand how can I get the intersection...
Sincerely,
Gonzalo Rojas Costa
--
Gonzalo Rojas Costa
Laboratory of Medical Image Processing
Department of Neuroradiology
Institute of Neurosurgery Dr. Asenjo
Jose Manuel Infante 553, Providencia, Santiago, Chile.
Tel/Fax: 56-2-2003290
Cel: 56-9-7771785
www.neurorradiologia.cl
On Tue, 10 Apr 2007 07:51:18 +0100, Steve Smith <[log in to unmask]>
wrote:
>The approach that I described tells you where the two sessions
>activate on average. If you want to ask the slightly different
>question "where do they BOTH activate in their own right" then just
>take the intersection of their two activation maps carried out in
>isolation.
>
>Cheers.
>
>
>On 8 Apr 2007, at 21:18, Gonzalo Rojas wrote:
>
>> Hi:
>>
>> Thank you very much for your answer...
>>
>> And, How can I get the activation areas thar are common to both
>> first-
>> level analysys ?...
>>
>> Sincerely,
>>
>>
>> Gonzalo Rojas Costa
>>
>>
>> On Sun, 8 Apr 2007 07:47:29 +0100, Steve Smith <[log in to unmask]>
>> wrote:
>>
>>> Hi - you can combine two runs with a fixed-effects second-level
>>> analysis. The design should be a single EV with "1" for both
>>> timepoints, the contrast should be [1] and you should select the
>>> Fixed Effects model instead of Mixed Effects.
>>>
>>> Cheers.
>>>
>>>
>>>
>>> On 8 Apr 2007, at 01:43, Gonzalo Rojas wrote:
>>>
>>>> Hi:
>>>>
>>>> I have the first-level analysis of two different fMRI studies of
>>>> the same patient... How can I do a higher level analysis to get the
>>>> difference between the first-level analysis ?... I read the
>>>> documentation of FSL, but I couldn't understand very well how can I
>>>> do such higher-level analysis...
>>>>
>>>> Sincerely,
>>>>
>>>>
>>>> Gonzalo Rojas Costa
>>>>
>>>>
>>>> --
>>>> Gonzalo Rojas Costa
>>>> Laboratory of Medical Image Processing
>>>> Department of Neuroradiology
>>>> Institute of Neurosurgery Dr. Asenjo
>>>> Jose Manuel Infante 553, Providencia, Santiago, Chile.
>>>> Tel/Fax: 56-2-2003290
>>>> Cel: 56-9-7771785
>>>> www.neurorradiologia.cl
>>>
>>>
>>> ---------------------------------------------------------------------
>>> ---
>>> ---
>>> 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
>>> ---------------------------------------------------------------------
>>> ---
>>> ---
>
>
>------------------------------------------------------------------------
>---
>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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