[caret-users] constantly getting either Error in hind brain segmentation or segmentation fault

[David Van Essen]

Krishna,

Caret's segmentation algorithm was originally generated for humans and  
has not yet been fully customized for the macaque.  However, i would  
not expect the behavior you describe.

Try uploading your dataset to
http://pulvinar.wustl.edu/cgi-bin/upload.cgi

Then let Donna Dierker (donna at brainvis.wustl.edu)  know the filename.   
We may be able to debug from our side.

David VE

On Feb 23, 2008, at 6:33 PM, Krishna Srihasam wrote:

> Hi Everyone,
>
> I am new to CARET . As a first project, I've been trying to segment  
> a hemisphere in Caret 5.5 ( using the instructions from Caret 5  
> tutorial : Segmentation, Flattening, and Registration).
>
> I have a 0.5mm isotropic anatomical image of a macaque in Analyze  
> format and where ever I set the gray and white peaks I  get a  
> hindbrain  segmentation error. If I disable disconnect hind brain I  
> get a segmentation fault repeatedly.
>
> I have tried several different combinations of Gray and White peak  
> values:
>
> Gray 34, White 38;
> Gray 38, White 42;
> Gray 43, White 46;
> All these peak values give a Hindbrain Error and disabling  
> Disconnect Hindbrain in SureFit Segmentation operations  gives me a  
> segmentation fault.
>
> I tried using Gray 29, White 61 as peaks.  The segmentation went  
> through when i set low threshold for hindbrain. But the output after  
> this had most of occipital lobe missing.
>
> Any help me would be greatly appreciated.
>
> Thanks in advance.
> regards,
> Krishna.
>
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