[Insight-users] 2d - 3d registration

[N.E Mackenzie-Mackay]

Hey luis,

	Thanks for the help.  Is there any metric or another way that I could 
register a 2d slice without slice inserting it into a pesudo 3d image.

	Also on a follow up.  Would your suggestion also work with multiple 2d 
images?  e.g.  I have multiple ultrasound images that I want to 
register to a CT volume.  If I inserted say 2, 3 or 20 ultrasound 
images into a 3d image (all calibrated in the same space) could I use 
your technique you suggested to register them to a 3d ct volume... 
using the correct metric of-course.

Neilson


On Apr 6, 2004, at 5:48 PM, Luis Ibanez wrote:

>
> Hi,
>
> The MeanSquares Metric is assuming that both images will
> have the same dimension. You could set your slice as the
> fixed image and set it as a 3D image with a single slice.
>
> In that circumstances, the pixels of the fixed image are
> visited and mapped throught the transform into the moving
> image (that will be your real 3D image).
>
>
> Please instantiate the metric for two images of 3D, and
> read the slice into a 3D image, it will have dimensions
> ( N X M X 1 ).
>
>
>
>   Regards,
>
>
>     Luis
>
>
>
> --------------------------
> N.E Mackenzie-Mackay wrote:
>
>> This might seem like a simple question.
>> To register a 2d slice to a 3d volume ( set of slices ) say using the 
>> MeanSquaresImageToImageMeric. Is it just a matter of specifying the 
>> dimensions of the images.
>>     eg.  typedef itk::Image<float, 3> FixedImageType    //3d slices
>>         typedef itk::Image<float, 2> MovingImageType        //2d image
>>         .....
>>         typedef itk::MeanSquaresImageToImageMeric<FixedImageType, 
>> MovingImageType >   MetricType
>> Would this be correct or is there a different method I have 
>> completely overlooked?
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>
>
>