# Obtaining Volume Information for Brain Segmentation Using Closed-Loop Markups in 3D Slicer

**URL:** <https://discourse.slicer.org/t/obtaining-volume-information-for-brain-segmentation-using-closed-loop-markups-in-3d-slicer/31846>\
**Category:** Support\
**Tags:** segmentation, volume, markups\
**Created:** [September 22, 2023, 2:44pm UTC](https://discourse.slicer.org/t/obtaining-volume-information-for-brain-segmentation-using-closed-loop-markups-in-3d-slicer/31846 "2023-09-22T14:44:55Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![sund](https://avatars.discourse-cdn.com/v4/letter/s/d78d45/32.png) [@sund](https://discourse.slicer.org/u/sund)\
**Post date:** [September 22, 2023, 2:44pm UTC](https://discourse.slicer.org/t/obtaining-volume-information-for-brain-segmentation-using-closed-loop-markups-in-3d-slicer/31846/1 "2023-09-22T14:44:55Z")

</div>

Hello everyone,

I have been using the closed-loop markup module in 3D Slicer to segment the brain on individual MRI slices. Now, I am trying to obtain volume information for the entire brain by considering the closed-loop markup delineations from all slices collectively.

Is there a straightforward way to calculate the total volume of the brain based on these closed-loop markups in 3D Slicer? Your guidance and suggestions would be greatly appreciated.

Thank you in advance!

---

<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [September 22, 2023, 3:36pm UTC](https://discourse.slicer.org/t/obtaining-volume-information-for-brain-segmentation-using-closed-loop-markups-in-3d-slicer/31846/2 "2023-09-22T15:36:35Z")

</div>

I don’t think there’s an easy way to go from a closed curve markup to a volume calculation.

The Draw tool in the Segment Editor is similar and creates segmentations directly, and volumes can be calculated with the Segment Statistics module.