Export Segmentation in DICOM-RT format

Support
#1

Dear all,

What I would like to do is to export a clipped region (from Dynamic Modeler) into a DICOM-RT file. I have searched throughout the Forum with no answer. It has bothered me for a long time. Any help from your side will be much appreciated.

Operating system: Windows 10
Slicer version: 4.11.20210226
Expected behavior: Export a Segmentation in DICOM-RT format
Actual behavior:

My workflow is as follows:

  1. Imput a CT data set with some heart Segmentations (in RTSTRUCT format);
  2. “Export visible segments to models”;
  3. Generate a Segmentation (ClippedRegion) by Dynamic Modeler (using curve cut);
  4. “Convert model to segmentation node”;
  5. Right click this segmentation, then click “Export to DICOM…”;
  6. Get the error message “Must export the primar anatomical (CT/MR) image” (see the screenshot below).

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Could you give me some support?

Thank you so much!

#2

And it seems that the new Segmentation is not “linked” to the primary CT data set? When I click the CT data set in this Export window, the label of the original segmentation with the CT will turn green. I guess this means the original segmentation is “linked” with the CT. This is maby another problem.

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#3

If I remember correctly, the segmentation needs to be a sibling of the CT under the study, and not under the CT. Please try that and let us know.

1 Like
#4

Hi Csaba, I have tried and it works now. Thanks for your support!

1 Like
#5

It is great that it works now. @cpinter is there a specific reason why the segmentation must be a directly under the study item? Should we make the export mechanism more robust (e.g., do a recursive search from the study level)? If we don’t implement a fix right now then we should at least add an issue to the tracker to remember to work on this later.

1 Like
#6

Accepting more valid scenarios would be nice indeed. I added an issue More robust item discovery for export · Issue #185 · SlicerRt/SlicerRT · GitHub