# Color scale for PET segmentation

**URL:** <https://discourse.slicer.org/t/color-scale-for-pet-segmentation/33191>\
**Category:** Support\
**Created:** [December 4, 2023, 12:56am UTC](https://discourse.slicer.org/t/color-scale-for-pet-segmentation/33191 "2023-12-04T00:56:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ykl](https://avatars.discourse-cdn.com/v4/letter/y/9de0a6/32.png) [@ykl](https://discourse.slicer.org/u/ykl)\
**Post date:** [December 4, 2023, 12:56am UTC](https://discourse.slicer.org/t/color-scale-for-pet-segmentation/33191/1 "2023-12-04T00:56:51Z")

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Operating system: Windows 11  
Slicer version: 5.4.0

Hi, I’d like to know how to use a color scale “Rainbow” typically used in PET interpretation software. I am intending to delineate tumors on PET PSMA but need to have the window set at Rainbow for standardisation and to follow PET reporting guidelines

Thanks

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**Author:** ![YangPei](https://avatars.discourse-cdn.com/v4/letter/y/df788c/32.png) [@YangPei](https://discourse.slicer.org/u/YangPei)\
**Post date:** [December 4, 2023, 2:23am UTC](https://discourse.slicer.org/t/color-scale-for-pet-segmentation/33191/2 "2023-12-04T02:23:06Z")

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choose the volumes module—and set your active volume with PET images, and then you can select Lookup Table—PET-rainbow style.