# PETDICOMExtension - change formula lean body mass

**URL:** <https://discourse.slicer.org/t/petdicomextension-change-formula-lean-body-mass/11085>\
**Category:** Support\
**Created:** [April 12, 2020, 2:29am UTC](https://discourse.slicer.org/t/petdicomextension-change-formula-lean-body-mass/11085 "2020-04-12T02:29:32Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![VictorAlves](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/victoralves/32/6563_2.png) [@VictorAlves](https://discourse.slicer.org/u/VictorAlves)\
**Post date:** [April 12, 2020, 2:29am UTC](https://discourse.slicer.org/t/petdicomextension-change-formula-lean-body-mass/11085/1 "2020-04-12T02:29:33Z")

</div>

Hi!  
I would to calculate the SUV corrected to the lean body mass, using a different formula from that used by the author of the extension.  
I downloaded the extension for Github, and edited the respective file (a .cxx file), but now I don’t know what I have to do in order to import that extension to Slicer.  
I thought the procedure was simple but I afraid I it necessary compilation or some think like that. I tried it in VS even I don’t C++ and think king of languages and I cannot to performed it.

---

<div class="post-metadata">

**Author:** ![VictorAlves](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/victoralves/32/6563_2.png) [@VictorAlves](https://discourse.slicer.org/u/VictorAlves)\
**Post date:** [April 12, 2020, 1:09pm UTC](https://discourse.slicer.org/t/petdicomextension-change-formula-lean-body-mass/11085/2 "2020-04-12T13:09:58Z")

</div>

Problem solved. I was already able to compile a extension locally.