I think the only value hardcoded for human clinical CT is the preview image resolution of 2mm. This is probably too large for microCT.
You can easily modify this value by editing this line in LungCTSegmenter.py file:
Alternatively, you can modify the spacing value of the volume in Volumes module to be 10x larger. This does not change the image in any way, it just makes all length measurements 10x larger.
@rbumm we could consider allowing users to edit this value in some advanced parameters section in the GUI.