hi i need a contact who try to do this. y tried to do de segmentation in all of the cells in ethmoids. wich is the perfec and easy way
Usually there is no “perfect and easy way” of doing segmentation. You can expect to spend a couple of days with finding a good segmentation workflow, especially if the segmentation task is hard or if you are new to Slicer.
Here are tutorials that should help you to get started: https://www.slicer.org/wiki/Documentation/Nightly/Training#Segmentation