# How to measure the diameters of ROI?

**URL:** <https://discourse.slicer.org/t/how-to-measure-the-diameters-of-roi/26377>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [November 22, 2022, 12:43pm UTC](https://discourse.slicer.org/t/how-to-measure-the-diameters-of-roi/26377 "2022-11-22T12:43:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Thomas0086](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/thomas0086/32/17384_2.png) [@Thomas0086](https://discourse.slicer.org/u/Thomas0086)\
**Post date:** [November 22, 2022, 12:43pm UTC](https://discourse.slicer.org/t/how-to-measure-the-diameters-of-roi/26377/1 "2022-11-22T12:43:58Z")

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Hello!  
I have draw a 3D roi of a cancer leision, how to measure the max-diameters in three dimensions?

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**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:** [December 1, 2022, 6:23am UTC](https://discourse.slicer.org/t/how-to-measure-the-diameters-of-roi/26377/2 "2022-12-01T06:23:53Z")

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You can use Segment Statistics module to get the bounding box of each segment.