# How I can find the center of the humeroulnar joint using 3d slicer ?

**URL:** <https://discourse.slicer.org/t/how-i-can-find-the-center-of-the-humeroulnar-joint-using-3d-slicer/27779>\
**Category:** Support\
**Created:** [February 12, 2023, 12:45pm UTC](https://discourse.slicer.org/t/how-i-can-find-the-center-of-the-humeroulnar-joint-using-3d-slicer/27779 "2023-02-12T12:45:27Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![Julian\_KC](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/julian_kc/32/18359_2.png) [@Julian\_KC](https://discourse.slicer.org/u/Julian_KC)\
**Post date:** [February 16, 2023, 8:12am UTC](https://discourse.slicer.org/t/how-i-can-find-the-center-of-the-humeroulnar-joint-using-3d-slicer/27779/9 "2023-02-16T08:12:17Z")

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Hi, thank you for your answer.

I tried again and you have right, it’s work, thank you very much so I have two methods :

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/d/cd085f3a3b103d1bc45ddc0265e7a0af8a1eeac0.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/d/8/d86a884610d7774b3788dff551eece525d12fccf.png)

And this one :

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/c/ccf35d7579ee6415ac56604a14064477257aaf04.jpeg)

I don’t know if it’s really a probleme that the sphere don’t fit only the keeled part of the joint. I will try to get the center of that sphere and compare both mesures

Thank you very much again, if anyone know how to create a landmarks at the center of that sphere i’m interested in !

PS: I already looked here : [Get best fit sphere of humeral head - #6 by lassoan](https://discourse.slicer.org/t/get-best-fit-sphere-of-humeral-head/22975/6), But I don’t understand.

Thank you for your help !

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