Hidden crop when GROW from seeds tool is applied (Segment Editor Module)

[lassoan (Andras Lasso)]

You can modify extentGrowthRatio to add a larger margin around the seeds. If you specify a very large value then it will always include the entire volume. For example, if you use the Segment editor module:

gfs = slicer.modules.SegmentEditorWidget.editor.effectByName('Grow from seeds').self()
gfs.extentGrowthRatio = 10000

You may also try Local threshold effect, which takes care of the extent (it uses whatever large extent is needed), allows setting the threshold range in the same tool (you draw a small region to specify the threshold range, then you get the complete segmentation with a single Ctrl-click):

New Segment Editor effect: Local threshold

Local threshold, a new semi-automatic segmentation method, has been added to the Segment Editor. It is available in both the 4.11.0 and 4.10.2 releases through the SegmentEditorExtraEffects extension. This effect adds connected voxels to segments that are within a specified threshold, and attempts to prevent leaks into other structures through small connecting regions. The result is similar to that of the “Level trace” effect in that it delineates a region within a certain threshold value, howev…