[Insight-users] applying a transform to an otherset of images

[Luis Ibanez]

Hi Ludovic,


1) If is perfectly fine to register images that have different
    number of pixels. The fact that your:

               fixed image is of size 256 x 256 x 156

    while your:

               moving image is of siz 128 x 128 x 128

    shouldn't be a problem for the registration process, nor the
    resampling process.


2) Please verify that the origin and spacing of your images is
    correct. You can do this by calling

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

    and please post to the mailing list the output of the Print()
    statements.


3) Does your registration code has a Command/Observer connected
    to the optimizer ?

    If so, could you please post to the list the output of the
    registration iterations (typically : metric value and transform
    parameters).



   Regards,


      Luis


----------------------
ludovic Ferrer wrote:
> Hi all once again,
> I made a mistake in my last mail. All values were 0 or 32768. Moreover,
> my NM input file was not as expected. All pixel values were above 32768.
> 
> I substracted 32768 to my NM files and performed my registration once  
> again.
> I finally had a file for which pixels values seem to be correct except  
> that my resampled volume is partially out of my image althought my CT  
> scan were centered.
> 
> I think I found the reason why I have a misregistration between my CT  
> scan and my resampled NM volume.
> My CT scan is 256*256*128, my NM Volume is 128*128*128. So, resampling  
> my NM volume according to my CT  volume lead to  a NM volume size of  
> 256*256*256. And as, my CT volume has 128 slices, my NM volume is  
> cropped to 128 slices.
> Forgive to ask such a stupid question but
> How could I correctly resample in X,Y direction without touching to z ?
> 
> cheers
> 
> LF
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