3D modeling of abdominal aorta aneurysm

[Amine (Amine Azami)]

I can only help with the segmentation part:
First make a threshold that has both vascular and bone tissue then use this to separate the two

Cut 3d surface from the whole with accuracy

Hi, grow from seeds will not have an extent over the whole segment by default, that is why you either paint the limits you want it to have on a dummy segment (outside the segment you want to split, it will not be taken as a seed since its outside the editable area but will still define the boundaries of GFS) I see you only have one seeding segment, so it is normal for GFS to not work, you need to place seeds in the vertebra AND make another segment with seeds in the sacrum AND a segment outside…

This describes the same process with an Abdominal Aneurysm :

Suggestion: Quicker scissor tool and Seed growing to split a segment in two parts

As for the Second Proposition, i tought id make an illustrated description because it is really important, So the goal is to separate this threshold into vascular and Bone [1] To do this, the method i found is to use editable=inside that layer to paint seeding regions in two new segments [2] Then hide the original threshold, and do a growfromseeds with editable=Inside the hidden layer, to get this: [3] The problem here as you see is that grow from seeds defines cropping region limited to…

Ps: in this case you could just remove the bone using a sphere eraser