[Insight-users] register two volumes of different types

[Luis Ibanez]

Hi Grace,


Thanks a lot for sharing the screenshots of your images.


              They don't look too bad.


The registration shouldn't have major problems with these
two images.



Could you please do the following:


   1) Add an observer to your optimizer,

   2) Make it print the values of the Metric
      and Transform paramters at every iteration.

   3) Take the output of the observer and post it
      to this list.

   4) Add also statements such as

        fixedImage->Print( std::cout )
        movingImage->Print( std::cout )

      just before triggering the registration process,
      and post the output to the list too.



By looking at the values of the Metric, the Transform
parameters, and the metadata of your images we should
be able to identify the reason why your registration
process is not working.



   Regards



     Luis




-----------------------
Grace Chen wrote:
> Hi Luis,
> 
> Thanx so much for detailed reply.  With this mail, I've attached a slice
> from each of the volumes.
> 
> Thanx.
> 
> Grace
> 
> ----- Original Message ----- 
> From: "Luis Ibanez" <luis.ibanez at kitware.com>
> To: "Grace Chen" <Grace.Chen at swri.ca>
> Cc: <insight-users at itk.org>
> Sent: Thursday, December 01, 2005 10:45 AM
> Subject: Re: [Insight-users] register two volumes of different types
> 
> 
> 
>>Hi Grace,
>>
>>
>>                  Yes,
>>
>>
>>     ITK can register pairs of images
>>     that have different number of slices.
>>
>>
>>        or for that matter,
>>        different number of pixels
>>        along any dimension.
>>
>>
>>
>>If your registration program is not working
>>as you expected, here are the first things
>>that you should try:
>>
>>
>>1) Verify the values of Origin and Pixel
>>    Spacing for both images. Make sure that
>>    they are realistic values.
>>
>>2) Use a CenteredTransform Initializer.
>>
>>3) Connect an Observer to the Optimizer
>>
>>4) Plot the values of the Metric, at every
>>    iteration of the optimizer.
>>
>>5) Plot the list of Transform parameters
>>    at every iteration of the optimizer
>>
>>
>>Details on how to do each one of those steps
>>are presented in the ITK Software Guide
>>
>>   http://www.itk.org/ItkSoftwareGuide.pdf
>>
>>
>>
>>If you still have difficulties with your
>>registration process, please post your problem
>>as an article to the Insight Journal, and make
>>sure that you upload your two images, the source
>>code that you are using, and the parameters that
>>you  are passing to all the components of the
>>registration framework.
>>
>>
>>Please let us know if you have any question on
>>how to submit a report of negative results.
>>This is a forgotten art in the practice of scientific
>>research, mostly due to the detrimental influence of
>>the decadent publishing system that have provided
>>Pavlovian training to our community in order to only
>>report successful experiencies.
>>
>>
>>
>>
>>   Regards,
>>
>>
>>     Luis
>>
>>
>>
>>------------------
>>Grace Chen wrote:
>>
>>>Hi there,  Good day!
>>>
>>>I have two 3D image data I want to register.  The movement in the data
>>>is 3D rigid.  So, I use VersorRigid3DTransform.  The two volumes are
>>>different types of image data (one is T1 image, and the other
>>>is diffusion weighted image), so I use
>>>MattesMutualInformationImageToImageMetric. I know ITK can register two
>>>volumes of different physical dimension.  But doesn't it also register
>>>two volumes that have different number of slices?  My program doesn't
>>>work for two volumes of different types, am I missing something?
>>>
>>>Grace
>>>
>>>
>>>------------------------------------------------------------------------
>>>
>>>_______________________________________________
>>>Insight-users mailing list
>>>Insight-users at itk.org
>>>http://www.itk.org/mailman/listinfo/insight-users
>>
>>_______________________________________________
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>>
>>
>>
>> ------------------------------------------------------------------------
>>
>>
>> ------------------------------------------------------------------------
>>