Convert 3D contour point cloud to binary voxel map

See a script for converting a DICOM folder structure containing of RT Structure sets to labelmap volumes in NRRD format (and optionally corresponding CTs as well) and usage instructions here:

It is recommended to provide input CT images as well, because RT structure set does not contain slice spacing information, so without CT images the algorithm just tries to guess the spacing from the closest contour distance, which is of course not always optimal.

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