RTSTRUCT contour edit metadata
Edit structure-set labels and metadata on an RT Structure Set.
Problem
You have an RT Structure Set (RTSTRUCT) containing regions of interest (ROIs) defined by a radiation oncologist. The ROI names don’t follow your institution’s naming convention — e.g. “Tumor” should be “Target_GTV”. You need to rename ROIs, change their display colors, and delete unused ROIs — all while preserving the contour data and spatial coordinates.
Steps
-
Open the RTSTRUCT DICOM file (⌘O) — e.g.
rt-test.dcm. -
Open the RT tab in the right rail. The ROI list is displayed.
-
Rename an ROI — locate the ROI named “Tumor”, select it, and rename it to
Target_GTV. -
Change the ROI color — select the renamed ROI and set its display color to red (
#ff0000). The viewport reloads to reflect the new color. -
Delete an ROI — select
Target_GTV(or any unwanted ROI) and delete it. The ROI is removed from the list and the underlying sequence.
Expected Result
- ROI is renamed in the Structure Set ROI Sequence (3006,0020) with updated ROI Name (3006,0026).
- ROI display color is updated in the ROI Display Color tag (3006,002A) and rendered in the viewport.
- Deleted ROI is removed from the sequence entirely — both the ROI entry and its contour data.
- The structure set metadata row is marked modified (gold highlighting).
- Contour coordinates (3006,0039) for surviving ROIs are untouched.