You have three options, you can use all, but the first one is the most important:
- crop your input volume to the region of interest & resample to have sufficiently high resolution using the
Crop volume
module: specify your ROI, selectIsotropic spacing
, select sufficiently lowspacing scale
value (the lower the value, the more details you can preserve during segmentation, but more memory and processing time you will need; typically 0.5 … 0.2 should work), select bspline interpolator - smooth the labelmap representation using
Smoothing
effect in Segment editor module - smooth the generated surface: in Segment editor module, click on the small arrow on the “Show 3D” button, choose
Set surface smoothing
, and increase the smoothing value. (in older Slicer versions, this setting was only available in Segmentations module: clickUpdate
button in the row ofClosed surface
representation inRepresentations
section, click onBinary labelmap -> Closed surface
rule, increaseSmoothing factor
value)