[caret-users] draw borders for spherical registration

[Julia Molony]

John,

Your answer was very helpful.  Now I'm stuck with an initial flat map  
that has red highlights on a few of the edges.  The tutorial says  
this means there are handles that need to be corrected in the  
segmentation volume.  I don't have a volume.  I have Freesurfer  
surfaces that I'm using to compare warping methods.  Is there any  
solution to this cross over correction problem for already created  
surfaces?

There's just a little bit of red.  Here's a picture.  I can send more  
information, if that would be helpful.

Thank you.

Julia

--
Julia Molony
SSCC/NIMH/NIH

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On Jul 2, 2007, at 12:21 PM, John Harwell wrote:

>
> Hi Julia,
>
> During the flattening process, the medial wall border is normally  
> drawn on the Compressed Medial Wall Surface.  The CMW surface is a  
> sphere with the medial portion made flat so that 2D borders can be  
> drawn on it.  This surface should be selected from the model  
> selection control in the main window's toolbar.
>
> The "Smooth Fiducial Medial Wall" option results in the fiducial  
> surface's medial wall being smoothed during the flattening  
> process.  Smoothing will change the shape of the medial wall so  
> that it is relatively flat.  This option does not affect the  
> sphere.  There is normally some distortion around on the sphere  
> that should be removed by the morphing process that is part of  
> flattening.
>
> ----------------------------------------------------------
> John Harwell
> john at brainvis.wustl.edu
> 314-362-3467
>
> Department of Anatomy and Neurobiology
> Washington University School of Medicine
> 660 S. Euclid Ave.    Box 8108
> St. Louis, MO 63110   USA
>
> On Jul 2, 2007, at 10:09 AM, Julia Molony wrote:
>
>> I'm attempting to go through Caret's spherical registration stuff  
>> but first I need to work out how to draw all the borders.  I'm  
>> following the 5.5 tutorial and I'm stuck trying to draw the medial  
>> wall borders.  When I open the draw borders dialogue, choose the  
>> border name, set type to closed and dimension to 2D, and press  
>> apply, I can't draw the border.  I click on the sphere and hold  
>> the left mouse button and nothing is drawn.  Any ideas on what's  
>> going on?  I checked the D/C to see if "show borders" was selected  
>> and it is.  I've drawn borders in the past with no trouble, so I'm  
>> not sure what's happening here.
>>
>> Also, what does it mean in the "Flatten Full or Partial  
>> Hemisphere" box when it says "Smooth Fiducial Medial Wall".  It  
>> looks like this smoothing is causing distortions in the sphere.   
>> It makes the sphere look sort of swirly around the medial wall area.
>>
>> Julia
>>
>>
>> --
>> Julia Molony
>> SSCC/NIMH/NIH
>>
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>
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