# How to create an atlas based on PET image

**URL:** https://discourse.itk.org/t/how-to-create-an-atlas-based-on-pet-image/2853
**Category:** Algorithms
**Tags:** python
**Created:** [March 19, 2020, 12:47pm UTC](https://discourse.itk.org/t/how-to-create-an-atlas-based-on-pet-image/2853 "2020-03-19T12:47:05Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![drcjaudet](https://discourse.itk.org/letter_avatar_proxy/v4/letter/d/a698b9/32.png) [@drcjaudet](https://discourse.itk.org/u/drcjaudet)
#### Post date: [March 19, 2020, 12:47pm UTC](https://discourse.itk.org/t/how-to-create-an-atlas-based-on-pet-image/2853/1 "2020-03-19T12:47:05Z")

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Hello TTK community,  
Here a little bit of a technical question. The goal is to create an atlas image based on several whole body PET image (starting from 100 ot finally 10000) in an efficient way.  
Now i register the image with a multi resolution rigid transform one by one and calculate the mean of all image.  
Is there a more accurate way ?  
Thank you,  
Cyril