CT image processing about vtk-dicom HOT 5 CLOSED

The vtkDICOMCTRectifier satisfies most of the points raised in this issue. It regrids the volume, provides a new matrix, and it can work in reverse.

The points that is misses is that it does not create a mask.

from vtk-dicom.

Hi @dgobbi
Could you please give some advice how to figure out with point "4 - re-color voxels outside the reconstruction volume as "air" "?

from vtk-dicom.

DICOM sets the stored values of these voxels to PixelPaddingValue.

I've thought of two ways to re-color the padding voxels as air:

1. set the modality value of the padding voxels to -1000 (which is the value for air, Hounsfield units), or
2. use the padding voxels to create an alpha mask, so that all padding voxels are transparent and all reconstructed voxels are opaque

The first is probably the easiest to do.

from vtk-dicom.

Thank you.
I am not so experienced with this area, so I don't think I can realize it myself.
Do you have some example how to do it?
Or may be some article about this theme.
Any information will be useful for me.

Thanks

from vtk-dicom.

I haven't implemented it, so I don't have an example.

All I have is what you see here. Just an idea.

from vtk-dicom.