[Insight-users] multi-modality with FEM or with Demons ?

[Luis Ibanez]

Hi Eduard,

An example on how to perform deformable registration
using the BSpline transform has been added under


   Insight/Examples/Registration/
               DeformableRegistration4.cxx



You may have to update your CVS checkout in order to
get this example.



Regards,


    Luis


---------------------------
Eduard Schreibmann wrote:

> Hi Luis,
> 
> As you suggested in your previous e-mail, the Demons did not work so nice
> for the images I have, FEM needs more cofee and patience, so thinking of
> following your second advice on using BSpline.
> 
> Have problems understanding the code and how it works, mainly I can not
> understand how  BSplineDeformableTransform (or it's coeficients ?) are
> connected to an optimizer. Yes, users still ask such dull questions.
> 
> Is there any simple BSline example/demo available somewhere ? Some code in
> testing section is even more confusing for beginers.
> 
> Thank you in advance,
> Edi 
> 
> 
> 
>>Hi Edi,
>>Along those lines of reasoning, you may want to look
>>at the BSpline transform for managing deformable
>>registration. In this method, a BSpline is used to
>>interpolate deformations over a coarse grid overlapped
>>on top of the image. you control the deformation by
>>initializing the nodes of the grid.
>>
>>
>>
>>
>>Regards,
>>
>>
>>
>>    Luis
>>
>>
>>
>>---------------------------
>>Schreibmann Eduard wrote:
>>
>>
>>>Hello everybody,
>>>
>>>Question 1 :
>>>I want to use FEM to register some CT and MRI images, 
>>>using the  DeformableRegistration1.exe. With the 
>>>demo images, it works great but...
>>>
>>>When using some CT and MRI images that came with ITK (
>>>BrainT1Slice and BrainProtonDensitySlice.png ), and
>>>with setting the metric to 3 (MI) in the configuration
>>>file, the application finishes after 2-3 iterations
>>>without doing something visible to the input image.
>>>Basically, the only thing changed in the parameter
>>>file was file names and metric type.
>>>
>>>What parameters control this behavior ? 
>>>What settings are appropriate for this job ?
>>>
>>>Question 2: Is it true that demons can not be used for
>>>multi-modality registration ?
>>>
>>>Question 3: The "viscous fluid landmark" registration
>>>has anything to do with demons or FEM ?
>>>
>>>Thank you in advance,
>>>
>>>A nice day,
>>>Edi
>>>
> 
> 
> 
> 
>