I looked over the documentation but can;t seem to find what I am looking for. How exactly does the function project the mdi data onto the surface? What method is it using to accomplish this, is it just projecting to the nearest neighbor or is there something more complex occurring. I ask because I just want to make sure I completely understand what every step in my analysis is doing and not have it be a blackbox that I put data in and it gives me stuff out. Thanks for your help.
Nicholas
Hi Nicholas
mri_vol2surf has options that lets you control its behavior. It can do various types of sampling (e.g. averaging within the cortical ribbon, point sampling at a specified distance or percentage, etc....)
cheers Bruce
On Thu, 18 Sep 2014, Nicholas Heugel wrote:
I looked over the documentation but can;t seem to find what I am looking for. How exactly does the function project the mdi data onto the surface? What method is it using to accomplish this, is it just projecting to the nearest neighbor or is there something more complex occurring. I ask because I just want to make sure I completely understand what every step in my analysis is doing and not have it be a blackbox that I put data in and it gives me stuff out. Thanks for your help. Nicholas
For each vertex, the col, row, slice in the mdi is computed based on the registration. The value from this voxel is extracted; the default is nearest neighbor but this can be changed with --interp trilin doug
On 09/18/2014 10:52 AM, Nicholas Heugel wrote:
I looked over the documentation but can;t seem to find what I am looking for. How exactly does the function project the mdi data onto the surface? What method is it using to accomplish this, is it just projecting to the nearest neighbor or is there something more complex occurring. I ask because I just want to make sure I completely understand what every step in my analysis is doing and not have it be a blackbox that I put data in and it gives me stuff out. Thanks for your help.
Nicholas
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
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Bruce Fischl -
Douglas N Greve -
Nicholas Heugel