Re: [Freesurfer] How to determine a smoothing kernel size for surface that is approx. equal to 4mm in volumetric data?

2013-05-30 Thread Douglas N Greve

there is no equivalent. I'd start with 4 and move up.
doug

On 05/30/2013 02:51 PM, Glen Lee wrote:
 Hello Freesurfer users

 I'm trying to replicate my earlier findings in 3D space by warping the 
 data into surface  using freesurfer.

 Previously, the 3D data were smoothed using 4mm FWHM kernel and I'm 
 wondering what size of smoothing kernel for 2D would be equivalent to 
 4mm for volumes.

 Any help would be greatly appreciated.

 Glen



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Re: [Freesurfer] How to determine a smoothing kernel size for surface that is approx. equal to 4mm in volumetric data?

2013-05-30 Thread Bruce Fischl

Hi Glen

there is no way to get an equivalent 2D kernel to the 3D one.

sorry
Bruce


On Thu, 30 May 2013, Glen Lee 
wrote:



Hello Freesurfer users 
I'm trying to replicate my earlier findings in 3D space by warping the data
into surface  using freesurfer. 

Previously, the 3D data were smoothed using 4mm FWHM kernel and I'm
wondering what size of smoothing kernel for 2D would be equivalent to 4mm
for volumes. 

Any help would be greatly appreciated. 

Glen 


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