# Liver segment registration and comparison

**URL:** <https://discourse.slicer.org/t/liver-segment-registration-and-comparison/13889>\
**Category:** Support\
**Created:** [October 6, 2020, 1:22pm UTC](https://discourse.slicer.org/t/liver-segment-registration-and-comparison/13889 "2020-10-06T13:22:55Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![yann](https://avatars.discourse-cdn.com/v4/letter/y/bc79bd/32.png) [@yann](https://discourse.slicer.org/u/yann)\
**Post date:** [October 6, 2020, 1:22pm UTC](https://discourse.slicer.org/t/liver-segment-registration-and-comparison/13889/1 "2020-10-06T13:22:55Z")

</div>

Hello,  
How to register two liver segmentation masks before to compare them?  
In practis, I have liver segmentations masks from two different CT and I want to register this segmentations before to compare them (DICE comparisons and Hausdorff distances) with slicer RT.  
I found how to register two exams but not two segmentation masks.  
Can some one help me?

---

<div class="post-metadata">

**Author:** ![Andinet\_Enquobahrie](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/andinet_enquobahrie/32/75_2.png) [@Andinet\_Enquobahrie](https://discourse.slicer.org/u/Andinet_Enquobahrie)\
**Post date:** [October 7, 2020, 11:47am UTC](https://discourse.slicer.org/t/liver-segment-registration-and-comparison/13889/2 "2020-10-07T11:47:27Z")

</div>

Hello @yann

> [@yann](#):
>
> Hello,  
> How to register two liver segmentation masks before to compare them?  
> In practis, I have liver segmentations masks from two different CT and I want to register this segmentations before to compare them (DICE comparisons and Hausdorff distances) with slicer RT.  
> I found how to register two exams but not two segmentation masks.  
> Can some one help me?

There are a couple tools available to do this.

1. Segment Registration module

> **[GitHub - SlicerRt/SegmentRegistration: 3D Slicer extension for segment...](https://github.com/SlicerRt/SegmentRegistration)**
>
> 3D Slicer extension for segment registration (aka fusion, contour propagation) - GitHub - SlicerRt/SegmentRegistration: 3D Slicer extension for segment registration (aka fusion, contour propagation)

(you have to install SlicerRT extension module )

1. Surface registration module

[https://www.slicer.org/wiki/Documentation/Nightly/Modules/SurfaceRegistration](https://www.slicer.org/wiki/Documentation/Nightly/Modules/SurfaceRegistration)

( You will have to install CMFreg extension module for this)

-Andinet