RT / SEG tab

Inspect and lightly edit RTSTRUCT ROIs or SEG segments.

For RTSTRUCT objects, lists each Structure Set ROI with its number, display colour, contour count, and interpreted type. For SEG objects, lists each segment with its number, label, and algorithm type.

Tip Click a name/label to rename it (undoable tag edit). Click the colour swatch to recolour an ROI/segment, or ✕ to delete it — for RTSTRUCT this drops the ROI and its contours; for SEG it splices out the segment’s pixel frames and functional-group items and decrements the frame count. These structural edits rewrite a derived copy of the file. Tip Enable an ROI/segment to see its contours or mask drawn over the matching 2D slices, or open the centre-panel 3D view to inspect the structures as a point cloud, wireframe, or filled surface. Caution Recolour and delete re-serialise the dataset structurally and replace the loaded instance. 2D overlays are drawn on the original slice sequence, so they are unavailable in 3D MPR mode.