Support for DICOM Segmentation IOD

[SteEcker]

Hi thank you for this great project!

Are there any plans to support DICOM Segmentation IODs alongside standard DICOM RT Structure Sets?

[bastula]

Hi there,

Not at the moment, but happy to take a PR or start a discussion if that's a feature you would like to see. What's your use case?

There are also other projects that deal with Segmentation IODs such as highdicom that may be a good starting point as well.

[SteEcker]

The structures that I am working with are segmented on images with para-axial slice orientation. The points of a contour slice in the RTSS DICOM are not aligned with the patient-based coordinate system. Hence a single contour slice can have varying z-coordinates, which violates the assumption that dicompyler makes.

My use case would be that you can provide the structure(s) as volumes that contain the respective classification of pixels/voxels, which would be the case when using DICOM-SEG files (but in principle should also work by e.g. passing a sitk image). This would allow the generation of a DVH, regardless of the initial image orientation.

I setup a project in the meantime that does that. It still needs some polishing but if you are interested I can share.

Thank you for your time!

[SteEcker]

Regardless, of the Segmentation IOD support, I think it would be good to add an additional check to the DVH calculation that ensures that the z-coordinates are consistent.