When I export an STL file of the ribcage I segmented from 3D Slicer CTACardio CT scan, I obtain a solid body in CAD software for further processing of the body. However, when I export an STL file of this ribcage after performing an ROI cut, I obtain a sheet body in CAD software. Is there a reason why no solid body is obtained after performing an ROI cut? Is there a solution for this?
Thank you in advance!
Kind regards
a motivated student and admirer of 3D slicer