# Resample PET image

**URL:** <https://discourse.slicer.org/t/resample-pet-image/8904>\
**Category:** Support\
**Created:** [October 25, 2019, 3:28pm UTC](https://discourse.slicer.org/t/resample-pet-image/8904 "2019-10-25T15:28:59Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![zahiraabdala](https://avatars.discourse-cdn.com/v4/letter/z/838e76/32.png) [@zahiraabdala](https://discourse.slicer.org/u/zahiraabdala)\
**Post date:** [October 25, 2019, 3:28pm UTC](https://discourse.slicer.org/t/resample-pet-image/8904/1 "2019-10-25T15:28:59Z")

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Hi all, I need to resample my PET image and I have a problem.  
When I resample my image in Slicer using the Resample Image (Brains) module, the image ends up correctly resampled except its image activity information, it´s show a different values of the original image. Someone know which could be a problem?  
Thanks.

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [October 25, 2019, 4:04pm UTC](https://discourse.slicer.org/t/resample-pet-image/8904/2 "2019-10-25T16:04:31Z")

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How different are the values? Some small amount of difference is expected due to filtering.

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<div class="post-metadata">

**Author:** ![zahiraabdala](https://avatars.discourse-cdn.com/v4/letter/z/838e76/32.png) [@zahiraabdala](https://discourse.slicer.org/u/zahiraabdala)\
**Post date:** [October 25, 2019, 4:15pm UTC](https://discourse.slicer.org/t/resample-pet-image/8904/3 "2019-10-25T16:15:23Z")

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Before at resample the image activity it´s more than 20000 Bq/ml and after resampling it´s 3000 Bq/ml

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<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [October 25, 2019, 5:07pm UTC](https://discourse.slicer.org/t/resample-pet-image/8904/4 "2019-10-25T17:07:48Z")

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That sounds pretty big - is there anyway this can be reproduced using shareable data? E.g. what happens if you use [public PET data](https://wiki.cancerimagingarchive.net/display/Public/QIN-HEADNECK)?

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**Author:** ![zahiraabdala](https://avatars.discourse-cdn.com/v4/letter/z/838e76/32.png) [@zahiraabdala](https://discourse.slicer.org/u/zahiraabdala)\
**Post date:** [October 25, 2019, 6:05pm UTC](https://discourse.slicer.org/t/resample-pet-image/8904/5 "2019-10-25T18:05:52Z")

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I don´t know how to use this public PET data, I´m in the webside but I don´t know where are the example. Can you help me with this?

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [October 25, 2019, 6:33pm UTC](https://discourse.slicer.org/t/resample-pet-image/8904/6 "2019-10-25T18:33:05Z")

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There’s sample PET data and instructions as part of this tutorial:

[https://www.slicer.org/wiki/Documentation/4.10/Training#Slicer4\_Quantitative\_Imaging\_tutorial](https://www.slicer.org/wiki/Documentation/4.10/Training#Slicer4_Quantitative_Imaging_tutorial)