# Vtk streamlines not aligning with reference image

**URL:** <https://discourse.slicer.org/t/vtk-streamlines-not-aligning-with-reference-image/12367>\
**Category:** Support\
**Created:** [July 3, 2020, 11:46pm UTC](https://discourse.slicer.org/t/vtk-streamlines-not-aligning-with-reference-image/12367 "2020-07-03T23:46:01Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Vinny](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/vinny/32/7052_2.png) [@Vinny](https://discourse.slicer.org/u/Vinny)\
**Post date:** [July 3, 2020, 11:46pm UTC](https://discourse.slicer.org/t/vtk-streamlines-not-aligning-with-reference-image/12367/1 "2020-07-03T23:46:01Z")

</div>

Hi,

I am using 3D Slicer 4.11.0-2020-06-06 and noticed that the imported vtk streamlines do not align with the corresponding reference scan; however, for 3D Slicer version 4.10.2, the streamlines do align.

Thanks,

Vinny

---

<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 4, 2020, 3:51am UTC](https://discourse.slicer.org/t/vtk-streamlines-not-aligning-with-reference-image/12367/2 "2020-07-04T03:51:41Z")

</div>

If you load old model files (that do not have embedded coordinate system information) then you may need to manually select “RAS” coordinate system in the “Add data” window.

See explanation here: [https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/MigrationGuide/Slicer#Slicer\_5.0:\_Models\_are\_saved\_in\_LPS\_coordinate\_system\_by\_default](https://www.slicer.org/wiki/Documentation/Nightly/Developers/Tutorials/MigrationGuide/Slicer#Slicer_5.0:_Models_are_saved_in_LPS_coordinate_system_by_default)

---

<div class="post-metadata">

**Author:** ![Vinny](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/vinny/32/7052_2.png) [@Vinny](https://discourse.slicer.org/u/Vinny)\
**Post date:** [July 4, 2020, 12:58pm UTC](https://discourse.slicer.org/t/vtk-streamlines-not-aligning-with-reference-image/12367/3 "2020-07-04T12:58:32Z")

</div>

Thank you Andras, this worked great.