# Coordinate systems

**URL:** <https://discourse.slicer.org/t/coordinate-systems/38482>\
**Category:** Support\
**Created:** [September 22, 2024, 2:04pm UTC](https://discourse.slicer.org/t/coordinate-systems/38482 "2024-09-22T14:04:24Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![andrewrj](https://avatars.discourse-cdn.com/v4/letter/a/b782af/32.png) [@andrewrj](https://discourse.slicer.org/u/andrewrj)\
**Post date:** [September 25, 2024, 1:13am UTC](https://discourse.slicer.org/t/coordinate-systems/38482/5 "2024-09-25T01:13:27Z")

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![Picture1](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/4/0/4054f09293bf1ebea747c36d7c0e2ce684592739.png)

Thanks for your help. That makes sense about the center option and for the magnitude and distance for inter-rater.  
I think my questions is similar to this post: [A bit of confusion about the slicer coordinate system](https://discourse.slicer.org/t/a-bit-of-confusion-about-the-slicer-coordinate-system/29883).  
I checked my settings and confirmed that patient right is screen left. In the picture I uploaded you can see for the same landmark, patients 319 and 320 in have x,y,z coordinates different than every other patient. Why is this happening only for 319 and 320?

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