RTStruct viewing anomalies for radiomics

Support
1

Operating system:Windows 10
Slicer version: 4.10.2
Expected behavior: imported RTStruct mask to show what MRI image regions are masked, and non-masked, when viewing
Actual behavior: Two problems:(1) The displayed binary image mask has artifacts (some masked slices are not shown as masked) (2) when I mouse over the mask + image, the ROI does not always show as being masked.

Basically, the masking when using the RTStruct Dicom doesn’t seem reliable when viewing. This is not a problem when I use a binary mask read in as a Dicom volume.

If this is just a viewing artifact, I’m not concerned. My concern is whether the RTstruct masks are not reliable for radiomics processing.

Thank you,
Mike

2

If you view the closed surface representation in slice views and you have complex segmentation (with holes, etc) then it is indeed just a visualization artifact. You can either switch to binary labelmap representation or switch to a recent Slicer version, where this problem has been already fixed.