Estimate percentage of cystic component


I would like to estimate the cystic composant of a tumor. Maybe using a percentage of voxel with high value (near water)?
I didn’t find anything like this in segment statistics.
Does anyone have an idea?

Thanks :slight_smile:

You can segment each component separately in Segment Editor (you can use Threshold effect with appropriate masking settings to split a part of a segment in a specific intensity range - see Masking section at the bottom). Then, you can get the volumes using Segment Statistics module.

I thing the neurosurgery planning tutorial explains this. It may even use a better tool for this - Grow from seeds - that segments all the different regions in one step, from a few scribbles.