# Information about how to perform segmentation of CT in presence of pacemaker

**URL:** <https://discourse.slicer.org/t/information-about-how-to-perform-segmentation-of-ct-in-presence-of-pacemaker/30444>\
**Category:** Support\
**Tags:** segmentation, dicom\
**Created:** [July 7, 2023, 7:45am UTC](https://discourse.slicer.org/t/information-about-how-to-perform-segmentation-of-ct-in-presence-of-pacemaker/30444 "2023-07-07T07:45:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Caterina](https://avatars.discourse-cdn.com/v4/letter/c/439d5e/32.png) [@Caterina](https://discourse.slicer.org/u/Caterina)\
**Post date:** [July 7, 2023, 7:45am UTC](https://discourse.slicer.org/t/information-about-how-to-perform-segmentation-of-ct-in-presence-of-pacemaker/30444/1 "2023-07-07T07:45:19Z")

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Dear support,  
I need to create a segmentation of thoracic tac in which a cardiac device (cardiac pacemaker) is placed.  
I performed total segmentation with TotalSegmentation Extension but I obtained only the specific anatomical regions.  
In a render view as CT-Muscle, I visualized the pacemaker, muscle and skin.  
Which is the best way to also segment the muscle where the cardiac device will be positioned and the cardiac device too?  
Is there a way to get the volume of a render like what you get from CT-Muscle rendering?  
Thanks