# Fail to export PET dicom files

**URL:** <https://discourse.slicer.org/t/fail-to-export-pet-dicom-files/22410>\
**Category:** Support\
**Tags:** dicom, pet\
**Created:** [March 9, 2022, 2:03pm UTC](https://discourse.slicer.org/t/fail-to-export-pet-dicom-files/22410 "2022-03-09T14:03:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![collamaf](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/collamaf/32/13595_2.png) [@collamaf](https://discourse.slicer.org/u/collamaf)\
**Post date:** [March 9, 2022, 2:03pm UTC](https://discourse.slicer.org/t/fail-to-export-pet-dicom-files/22410/1 "2022-03-09T14:03:57Z")

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Operating system: MacOs 12.2.1  
Slicer version: 4.13.0-2021-12-28  
Expected behavior: Being able to export a just imported PET Dicom series  
Actual behavior: “Creating DICOM files from scalar volume failed”

Hello everbody  
I tried the following:

- Open Slicer
- Load e PET/CT dicom folder
- I correctly see the PET image  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/8/c/8ca29273a0e527e0a37b706f77f44cd02c1a3a39.png)
- I want to export again in DICOM files that PET image, so I
- Right click on it
- “Export to DICOM”
- Check (without touching anything) that “Modality” is set as “PT”
- I get the error:  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/f/5ff98fe6d0e72a71e2ba256e23755c3e255d3197.png)

The log gives the following:

` PARSE ERROR: Argument: (--modality) Value 'PT' does not meet constraint: CT|MR|NM|US|CR|SC`

Does it mean that it is not possible to export PET Dicom files from Slicer?

I Tried to set the field to “NM”, and the export succeeds. But some metadata are lost in the output files, like the “RescaleSlope”…

Thanks in advance!

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**Author:** ![Liu\_Lance](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/liu_lance/32/14386_2.png) [@Liu\_Lance](https://discourse.slicer.org/u/Liu_Lance)\
**Post date:** [April 4, 2022, 4:44am UTC](https://discourse.slicer.org/t/fail-to-export-pet-dicom-files/22410/2 "2022-04-04T04:44:44Z")

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I run into the same problem, still can not find a solution. Have you sovled this?

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**Author:** ![collamaf](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/collamaf/32/13595_2.png) [@collamaf](https://discourse.slicer.org/u/collamaf)\
**Post date:** [April 4, 2022, 5:35am UTC](https://discourse.slicer.org/t/fail-to-export-pet-dicom-files/22410/3 "2022-04-04T05:35:05Z")

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Hi  
No, no solution nor information found 🤷🏻‍♂️

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<div class="post-metadata">

**Author:** ![collamaf](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/collamaf/32/13595_2.png) [@collamaf](https://discourse.slicer.org/u/collamaf)\
**Post date:** [July 25, 2022, 9:22am UTC](https://discourse.slicer.org/t/fail-to-export-pet-dicom-files/22410/4 "2022-07-25T09:22:30Z")

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Hi everybody  
Just to update that I find this issue also in Slicer 5.1.0-2022-07-06  
@lassoan Any idea? Thanks