# Pet/CT Scan DICOM files show "Reference image in series does not contain geometry information" error

**URL:** https://discourse.slicer.org/t/pet-ct-scan-dicom-files-show-reference-image-in-series-does-not-contain-geometry-information-error/42027
**Category:** Support
**Tags:** dicom, 3d-model, pet, petct, 3d-printing
**Created:** [March 8, 2025, 12:48am UTC](https://discourse.slicer.org/t/pet-ct-scan-dicom-files-show-reference-image-in-series-does-not-contain-geometry-information-error/42027 "2025-03-08T00:48:53Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![neutronstar](https://avatars.discourse-cdn.com/v4/letter/n/d6d6ee/32.png) [@neutronstar](https://discourse.slicer.org/u/neutronstar)
#### Post date: [March 8, 2025, 12:48am UTC](https://discourse.slicer.org/t/pet-ct-scan-dicom-files-show-reference-image-in-series-does-not-contain-geometry-information-error/42027/1 "2025-03-08T00:48:53Z")

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Hi! I’m sorry I’m very new to 3d Slicer. I’m trying to 3d print one of my organs from my pet/ct scan. When I upload it to 3d slicer I can see the results, but I can’t see the 3d model.

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/1/a/1a401d01804292d51a5b865c685a0cd82cb7be37.png)

What should I do to fix this issue?

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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: [March 8, 2025, 12:50am UTC](https://discourse.slicer.org/t/pet-ct-scan-dicom-files-show-reference-image-in-series-does-not-contain-geometry-information-error/42027/2 "2025-03-08T00:50:39Z")

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Often fused PET/CT images are saved as a series of secondary capture images. These are not suitable for further analysis or 3D reconstruction, only for viewing as a set of 2D images.

If you want to 3D print then you can load and segment the CT image.