[vtkusers] internal radiotherapy kernel

[Cory Quammen]

Richard,

By spatially invariant, I mean that the 2D kernel function that is
accumulated in the dose grid is the same no matter where the treatment
point is. Is that the case?

Cory

On Thu, Oct 15, 2015 at 11:46 AM, Richard Brown <richard.j.brown at live.co.uk>
wrote:

> Cory,
>
> Thanks for the reply, but the kernel is not spatially invariant, it has a
> sharp peak in the centre (like the image in this link:
> http://www.jacmp.org/index.php/jacmp/article/viewFile/4371/3082/46375).
>
> Thanks,
> Richard
>
> On 15 Oct 2015, at 15:14, Cory Quammen <cory.quammen at kitware.com> wrote:
>
> Richard,
>
> If your kernel is spatially invariant, you may want to look into
> vtkFastSplatter [1].
>
> Thanks,
> Cory
>
> [1]
> http://www.vtk.org/doc/nightly/html/classvtkFastSplatter.html#a921b3de4b2b70437aa7273342fedfb74
>
> On Thu, Oct 15, 2015 at 8:23 AM, mbcx9rb9 <richard.j.brown at live.co.uk>
> wrote:
>
>> Hi all,
>>
>> Im working on internal radiotherapy and, currently, I calculate my
>> absorbed
>> dose information (DVH etc.) by adding a kernel (vtkImageData) at each
>> treatment point to a large dose grid (vtkImageData) that covers the whole
>> treatment region. Then I pass by vtkImageAccumulate to do the dosimetry.
>>
>> Is this the best way to do it? Because if the majority receives no
>> absorbed
>> dose, it seems wasteful (in terms of memory) to have those voxels at the
>> same resolution as in my kernel, where I have a very steep gradient of
>> absorbed dose.
>>
>> Are there any other approaches? Would it, for example, be possible to
>> store
>> my kernel as a vtkUnstructuredGrid and still pass it by vtkImageAccumulate
>> and get the same results?
>>
>> Thanks for any responses in advance.
>>
>>
>>
>> --
>> View this message in context:
>> http://vtk.1045678.n5.nabble.com/internal-radiotherapy-kernel-tp5734426.html
>> Sent from the VTK - Users mailing list archive at Nabble.com.
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>
>
>
> --
> Cory Quammen
> R&D Engineer
> Kitware, Inc.
>
>
>


-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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