Hi Bruce
What I mean is - labeled sulci in volume space, overlaid onto surfaces and
then averaged across subjects.
Trisanna
--
Ph.D. Candidate
McGill University
Integrated Program in Neuroscience
Psychology
On Thu, Mar 30, 2017 at 12:56 PM, Bruce Fischl
wrote:
> what is a sulcal probability
what is a sulcal probability map?
On Thu, 30 Mar 2017, Trisanna Sprung-Much
wrote:
> thanks, Bruce - that is what I am learning. And if it was to smooth data
> from a sulcal probability map? A FWHM of 10 seems pretty high
> best
>
> Trisanna
>
> --
> Ph.D. CandidateMcGill University
> Integ
thanks, Bruce - that is what I am learning. And if it was to smooth data
from a sulcal probability map? A FWHM of 10 seems pretty high
best
Trisanna
--
Ph.D. Candidate
McGill University
Integrated Program in Neuroscience
Psychology
On Thu, Mar 30, 2017 at 12:17 PM, Trisanna Sprung-Much <
t
Hi Trisanna
sorry, there is no easy answer to this question. It depends on what you
are trying to do.
Bruce
On Wed, 29 Mar 2017, Trisanna Sprung-Much wrote:
> Hi there
> I am wondering whether there is an acceptable FWHM to use to smooth surface
> data (for instance, a probability map)?
>
> Ma
Hi there
I am wondering whether there is an acceptable FWHM to use to smooth surface
data (for instance, a probability map)?
Many thanks
Trisanna
--
Ph.D. Candidate
McGill University
Integrated Program in Neuroscience
Psychology
___
Freesurfer mailing
On 10/10/2016 08:20 AM, Qi Ting wrote:
> Dear Freesurfer experts,
>
> I am trying to do the group analysis, before this I tried to smooth the data
> with the different smoothing kernel. However, when I checked the output dir,
> it turned out that data were smoothed with a larger smoothing kerne
Dear Freesurfer experts,
I am trying to do the group analysis, before this I tried to smooth the data
with the different smoothing kernel. However, when I checked the output dir, it
turned out that data were smoothed with a larger smoothing kernel than I
expected. For example, images intended t
Hi Sasha,
it depends on how many subjects you have in your study (more subjects,
less smoothing required), and how anatomically localized you believe your
effects should be (more localized less smoothing). Note that in general you
don't pay nearly as steep a price for extremely large smoothing
There's no real good answer to this, either in the volume or the
surface. We usually go from 5-20mm. Some considerations are:
1. Make fwhm = size of your activation.
2. More smoothing can sometimes compensate for misregistration
3. Smoothing does affect multiple comparisons.
doug
Sasha W
Dear all,
In group analysis, how should I determine which value to use for the
Gaussian fwhm smoothing kernel? Is there a recommended number?
Thanks,
Sasha
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