# My segment is flipped when exported when opening in MRIcron

**URL:** <https://discourse.slicer.org/t/my-segment-is-flipped-when-exported-when-opening-in-mricron/18226>\
**Category:** Support\
**Created:** [June 19, 2021, 3:57pm UTC](https://discourse.slicer.org/t/my-segment-is-flipped-when-exported-when-opening-in-mricron/18226 "2021-06-19T15:57:18Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Juicy](https://avatars.discourse-cdn.com/v4/letter/j/74df32/32.png) [@Juicy](https://discourse.slicer.org/u/Juicy)\
**Post date:** [June 21, 2021, 8:05am UTC](https://discourse.slicer.org/t/my-segment-is-flipped-when-exported-when-opening-in-mricron/18226/3 "2021-06-21T08:05:21Z")

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This may help?

> [@Model files are now saved in LPS coordinate system](https://discourse.slicer.org/t/model-files-are-now-saved-in-lps-coordinate-system/10446):
>
> While Slicer uses RAS coordinate system internally, images, transforms, and markups files are stored in LPS coordinate system, because DICOM and all medical image computing software (maybe except a few very old ones) uses LPS coordinate system in files. However, Slicer has been still using its internal RAS coordinate system in mesh files (STL, VTK, VTP, OBJ, PLY), which [caused issues when interfacing with third-party software](https://issues.slicer.org/view.php?id=4445). Starting from tomorrow (Slicer-4.11.0-2020-02-26, revision 28794), …

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