# How to calculate surface only on one slide (2D) ?

**URL:** <https://discourse.slicer.org/t/how-to-calculate-surface-only-on-one-slide-2d/31358>\
**Category:** Support\
**Tags:** segmentation, segment-statistics\
**Created:** [August 25, 2023, 1:26pm UTC](https://discourse.slicer.org/t/how-to-calculate-surface-only-on-one-slide-2d/31358 "2023-08-25T13:26:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jancel](https://avatars.discourse-cdn.com/v4/letter/j/f14d63/32.png) [@jancel](https://discourse.slicer.org/u/jancel)\
**Post date:** [August 25, 2023, 1:26pm UTC](https://discourse.slicer.org/t/how-to-calculate-surface-only-on-one-slide-2d/31358/1 "2023-08-25T13:26:17Z")

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Hi, i a m new on 3D slicer.  
I already managed to creat segment on my ROI. Now i just want to calculate the surface on one axial image (so in 2D).  
How can i do that ?  
Thanks all