it's pretty unimportant for simple block designs, especially if you use
the temporal derivative in your design matrix. If you want to do
slice-timing correction do it before ICA
best
christian
On 21 May 2004, at 18:12, Jennifer Bramen wrote:
> What about slice timing correction? Yay or nay?
>
>
> On May 21, 2004, at 10:01 AM, Christian F. Beckmann wrote:
>
>> Hi
>>
>> mainly because you don't want the large amount of smoothing that
>> people
>> typically do in pre-stats. If you want to get rid of residual motion,
>> try temporal filtering and mc first, run ICA on that and then use
>> spatial filtering to blur.
>> cheers
>> christian
>>
>> On 21 May 2004, at 15:48, Jennifer Bramen wrote:
>>
>>> Hi Everyone,
>>>
>>> I was wondering why using the raw data, and not the filterered_func
>>> data created after prestats, is
>>> suggested if you want to use MELODIC to de-noise. It seems to me
>>> that
>>> you would want to
>>> remove any residual effects of motion AFTER motion correction, not
>>> before.
>>>
>>> Thanks!
>>>
>>> Jen
>>>
>>>
>>> Jennifer Bramen
>>> UCLA Brain Mapping Center
>>> 660 Charles Young Dr. So
>>> Los Angeles, CA 90095
>>>
>> --
>> Christian F. Beckmann
>> Oxford University Centre for Functional
>> Magnetic Resonance Imaging of the Brain,
>> John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
>> Email: [log in to unmask] - http://www.fmrib.ox.ac.uk/~beckmann/
>> Phone: +44(0)1865 222782 Fax: +44(0)1865 222717
>>
>>
> Jennifer Bramen
> UCLA Brain Mapping Center
> 660 Charles Young Dr. So
> Los Angeles, CA 90095
>
--
Christian F. Beckmann
Oxford University Centre for Functional
Magnetic Resonance Imaging of the Brain,
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
Email: [log in to unmask] - http://www.fmrib.ox.ac.uk/~beckmann/
Phone: +44(0)1865 222782 Fax: +44(0)1865 222717
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