# How to perform tumor segmentation on PET and map it onto CT

**URL:** https://discourse.slicer.org/t/how-to-perform-tumor-segmentation-on-pet-and-map-it-onto-ct/40319
**Category:** Support
**Tags:** segmentation, segmentations, segment-editor
**Created:** [November 21, 2024, 10:18pm UTC](https://discourse.slicer.org/t/how-to-perform-tumor-segmentation-on-pet-and-map-it-onto-ct/40319 "2024-11-21T22:18:01Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![ko\_cindy](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ko_cindy/32/78606_2.png) [@ko\_cindy](https://discourse.slicer.org/u/ko_cindy)
#### Post date: [November 21, 2024, 10:18pm UTC](https://discourse.slicer.org/t/how-to-perform-tumor-segmentation-on-pet-and-map-it-onto-ct/40319/1 "2024-11-21T22:18:01Z")

</div>

Hi,  
I am new to slicer. I have PETCT images (nifti).  
I can segment tumor on PET based on threshold method.

But I don’t know how to put it on the CT image and then saved as nifti.  
Anyone know how to perform it?

Kind Regards,

Cindy