# How to get 3d heat map model from petct?

**URL:** <https://discourse.slicer.org/t/how-to-get-3d-heat-map-model-from-petct/18235>\
**Category:** Development\
**Created:** [June 20, 2021, 12:41pm UTC](https://discourse.slicer.org/t/how-to-get-3d-heat-map-model-from-petct/18235 "2021-06-20T12:41:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![timeanddoctor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/timeanddoctor/32/5839_2.png) [@timeanddoctor](https://discourse.slicer.org/u/timeanddoctor)\
**Post date:** [June 20, 2021, 12:41pm UTC](https://discourse.slicer.org/t/how-to-get-3d-heat-map-model-from-petct/18235/1 "2021-06-20T12:41:32Z")

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How to get 3d heat map model from pet-ct?

 ![微信图片_20210620203813](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/3/1/31069e1d6c2dc58fb05adb4ff036f48f0853a52d.jpeg)

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [June 20, 2021, 9:22pm UTC](https://discourse.slicer.org/t/how-to-get-3d-heat-map-model-from-petct/18235/2 "2021-06-20T21:22:15Z")

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If you use a recent Slicer version then you can drag-and-drop the PET volume into a 3D view to see it rendered using volume rendering.

However, the image above looks like thr surface of the brain, which is not visible on PET images. Has the surface segmented from MRI (or maybe CT)? Are you sure the coloring comes from PET? Do you know how the PET volume is used for coloring the surface?