# PETCTfusion (dealing with PET and CT DICOM images)

**URL:** https://discourse.slicer.org/t/petctfusion-dealing-with-pet-and-ct-dicom-images/8361
**Category:** Support
**Tags:** segmentation, dicom, pet, petct
**Created:** [September 10, 2019, 12:18pm UTC](https://discourse.slicer.org/t/petctfusion-dealing-with-pet-and-ct-dicom-images/8361 "2019-09-10T12:18:37Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![Nora](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/nora/32/4866_2.png) [@Nora](https://discourse.slicer.org/u/Nora)
#### Post date: [September 10, 2019, 12:18pm UTC](https://discourse.slicer.org/t/petctfusion-dealing-with-pet-and-ct-dicom-images/8361/1 "2019-09-10T12:18:37Z")

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Hi,

I’m trying to put my head around 3D slicer.  
I’ve downloaded version 4.10.2 and 4.11.0. I’ll be working with PET/CT images.

I’m trying to find PETCTfusion module but I couldn’t find it on the list, not even on the extension manger.  
I have bunch of CT and PET DICOM images and I want to segment tumours and calculate some features.

Appreciate your help.

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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: [September 11, 2019, 6:53pm UTC](https://discourse.slicer.org/t/petctfusion-dealing-with-pet-and-ct-dicom-images/8361/2 "2019-09-11T18:53:52Z")

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PETCTFusion module was developed for Slicer-3.x. In current Slicer-4.x version it is replaced by other modules. See details here: [https://www.slicer.org/wiki/Documentation/4.10/Modules/PETStandardUptakeValueComputation](https://www.slicer.org/wiki/Documentation/4.10/Modules/PETStandardUptakeValueComputation).

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### Author: ![mlewis1973](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mlewis1973/32/13560_2.png) [@mlewis1973](https://discourse.slicer.org/u/mlewis1973)
#### Post date: [December 17, 2021, 7:27pm UTC](https://discourse.slicer.org/t/petctfusion-dealing-with-pet-and-ct-dicom-images/8361/3 "2021-12-17T19:27:07Z")

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I believe the PETCTfusion module made the process of fusing PET and CT volumes easier than doing it manually. PETStandardUptakeValueComputation is based on PETCTFusion, but it doesn’t have the fusion tools, just the metric extraction tools. Anyone seen a nice PET-CT automatic fusion tool that  
requires minimal mouse clicks?

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### Author: ![mikbuch](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mikbuch/32/69022_2.png) [@mikbuch](https://discourse.slicer.org/u/mikbuch)
#### Post date: [February 16, 2023, 2:32pm UTC](https://discourse.slicer.org/t/petctfusion-dealing-with-pet-and-ct-dicom-images/8361/4 "2023-02-16T14:32:51Z")

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Hi @mlewis1973 , did you by any chance find a way (a module) to perform PET/CT fusion in Slicer?

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### Author: ![mikbuch](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mikbuch/32/69022_2.png) [@mikbuch](https://discourse.slicer.org/u/mikbuch)
#### Post date: [February 18, 2023, 11:37pm UTC](https://discourse.slicer.org/t/petctfusion-dealing-with-pet-and-ct-dicom-images/8361/5 "2023-02-18T23:37:25Z")

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A quick workaround to achieve PET-CT fusion would be to overlay PET scan over CT image using standard Slicer 3D visualization functionalities. The result is presented below:

 ![PET-CT_Fusion_PETish-colormap](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/e/1e6165a5ca62ec9ca3cb09da94fa2120d1ee06f5.jpeg)

Here I explain how to overlay the images: [Show two volumes overlaid - #5 by mikbuch](https://discourse.slicer.org/t/show-two-volumes-overlaid/2626/5)