[Insight-users] Re: Image or Mesh to Tubes

[Julien Jomier]

Hi Kevin,

As Luis pointed out. This is exactly the model-to-image approach we have 
been developing to fit a pre-operative vascular model to an 
intra/post-operative image volume.

Do you plan to use a rigid or deformable transformations?
Are you interested in model-to-image registration or do you investigate 
model-to-model registration as well?

In our approach we first do a global rigid alignment then a piece-wise 
rigid alignment of each branch starting from the trunk, then we perform 
a fully deformable registration.

More information can be found about in these papers:

Aylward S, Jomier J, Weeks S, Bullitt E, "Registration of Vascular 
Images," International Journal of Computer Vision, March 2003, pages 15

Jomier J, Aylward S, "Rigid and Deformable Vasculature-to-Image 
Registration: A Hierarchical Approach", MICCAI 2004

Let us know if you need more information,

Julien

Luis Ibanez wrote:
> 
> Kevin,
> 
> As you pointed out, if you want to fit a tree-tubular structure
> to the neurons in your image, doing this in a progressive manner
> is the way to go.
> 
> You could start by fitting a tube to the trunk of the dendrite,
> then from it start adding/fitting tube to the next level of
> branching, and so on. In this way you will only be fitting one
> tube at a time, and one of the tube ends will be almost anchored
> in the parent of the tree structure.
> 
> I'm sure Julien and Stephen will provide much valuable input
> on how to do this efficiently.
> 
> 
> 
>    Regards,
> 
> 
>       Luis
> 
> 
> ---------------------
> Kevin H. Hobbs wrote:
>> Thank you for your comments.
>>
>> On Wed, 2006-08-02 at 07:22 -0400, Luis Ibanez wrote:
>>
>>> You may want to get in touch with Julien Jomier and Stephen Aylward
>>> (cc in this email). They developed most of the Spatial Objects hierarchy
>>> in ITK, and they have been working in using the TubeSpatialObject for
>>> representing vascular trees by doing Model-to-Image registration.
>>>
>>
>>
>> I definitely look forward to their input.
>>
>>
>>> For some background on Model-to-Image registration, you may want to
>>> look at the final section of the Image Registration chapter in the
>>> ITK Software Guide
>>
>>
>> I'll reread that chapter. I was initially worried that adding branches
>> would change the number of parameters in a model, and might really make
>> optimization interesting. Now that I've slept on it however, I suppose
>> there's no reason that one piece couldn't be fit at a time, and added to
>> the tree.
>>
>>
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>>
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> 
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