# Surface Dice similarity coefficient

**URL:** <https://discourse.slicer.org/t/surface-dice-similarity-coefficient/29514>\
**Category:** Support\
**Tags:** registration, segmentation, python\
**Created:** [May 17, 2023, 4:02pm UTC](https://discourse.slicer.org/t/surface-dice-similarity-coefficient/29514 "2023-05-17T16:02:28Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Rukhsora](https://avatars.discourse-cdn.com/v4/letter/r/a88e4f/32.png) [@Rukhsora](https://discourse.slicer.org/u/Rukhsora)\
**Post date:** [May 17, 2023, 4:02pm UTC](https://discourse.slicer.org/t/surface-dice-similarity-coefficient/29514/1 "2023-05-17T16:02:28Z")

</div>

How can I obtain Surface Dice Coefficient in 3D Slicer 5.3.0. ?

---

<div class="post-metadata">

**Author:** ![cpinter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/cpinter/32/7995_2.png) [@cpinter](https://discourse.slicer.org/u/cpinter)\
**Post date:** [May 22, 2023, 8:59am UTC](https://discourse.slicer.org/t/surface-dice-similarity-coefficient/29514/2 "2023-05-22T08:59:05Z")

</div>

Dice coefficient is for volumes not surfaces. For surfaces you can calculate Hausdorff distance. Both are available in the Segment Comparison module in the SlicerRT extension.

FYI the forum has a search function, which is useful, as most basic questions have been already answered at least once, for example

> [@Dice similarity coefficient](https://discourse.slicer.org/t/dice-similarity-coefficient/19755/2):
>
> You can use Segment Comparison module (in SlicerRT extension).