[vtkusers] URGENT, PLEASE RESPOND: Getting Voxels from vtkImageData

[Mathieu Malaterre]

Hi Meisam,

 [http://www.catb.org/~esr/faqs/smart-questions.html#urgent]

 I do not believe there is anything out of the box for you in VTK.
Reading your post it looks like you are doing some kind of volume
rendering, is this correct ? If so I am sure you could reuse some of
the ray tracing stuff from VTK.

HTH
-Mathieu


On 6/20/07, Meisam Aliroteh <meisam.aliroteh at gmail.com> wrote:
>
>
> Hi all,
>
> I've used vtkDICOMImageReader to load a set of DICOM images representing the
> MRI scan of the brain of a patient. I've resampled the images using AMIRA to
> get cubical voxels. There are 192 images in total, placed in a directory and
> using the SetDirectoryName() method of the vtkDICOMImageReader I've loaded
> all. The output that I get from vtkDICOMImageReader is vtkImageData and here
> is what I need to do:
>
> Given the coordinate of a point in the data set and a direction vector, is
> there a feature in vtk that can return to me the set of voxels in the data
> set starting at this point going along the direction vector? For example,
> let's say that my point is located at (0,0,0) and the direction vector is
> (0,0,1) and I'm interested in getting 10 voxels along this direction vector
> starting at the point. How can I do this (rather efficiently since it is
> going to be done for a lot of points)??
> Also, how can this be done if the point coordinates and the vector
> coordinates are not integer values ?? i.e starting at (0.25, 1.7, 0.33) and
> going along the direction vector (1.2, 3.2, 0.1)
>
> Thanks in advance for your replies
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-- 
Mathieu