# Changing the origin of a volume

**URL:** <https://discourse.slicer.org/t/changing-the-origin-of-a-volume/637>\
**Category:** Support\
**Created:** [July 6, 2017, 3:59pm UTC](https://discourse.slicer.org/t/changing-the-origin-of-a-volume/637 "2017-07-06T15:59:03Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [July 6, 2017, 5:22pm UTC](https://discourse.slicer.org/t/changing-the-origin-of-a-volume/637/4 "2017-07-06T17:22:33Z")

</div>

Maybe what you need is landmark coordinates in voxel space (IJK) and you are wondering how to get that from landmark coordinates in physical (RAS) space?

See this discussion for information about RAS-\>IJK conversion: [Relationship between pixels and mm from Matlab](https://discourse.slicer.org/t/relationship-between-pixels-and-mm-from-matlab/427/2)

---

_[View the full topic](https://discourse.slicer.org/t/changing-the-origin-of-a-volume/637)._