# Comparing surface deformation

**URL:** <https://discourse.slicer.org/t/comparing-surface-deformation/22830>\
**Category:** Support\
**Created:** [April 5, 2022, 8:31am UTC](https://discourse.slicer.org/t/comparing-surface-deformation/22830 "2022-04-05T08:31:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![BORIPHAT](https://avatars.discourse-cdn.com/v4/letter/b/67e7ee/32.png) [@BORIPHAT](https://discourse.slicer.org/u/BORIPHAT)\
**Post date:** [April 5, 2022, 8:31am UTC](https://discourse.slicer.org/t/comparing-surface-deformation/22830/1 "2022-04-05T08:31:24Z")

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Hello, all

 ![Picture1](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/1/01e97fcc4b1ab98588179bcbbc0c0dcbab318a8d.jpeg)

My study is about comparing breast surface deformation between CT image and CBCT images (4 datasets). I would like to know which slice of breast image has the most surface deformation and how much distance of surface deformation. I used ruler tool for measurement. Are there the other methods for measurement and precision? Could you please give me some advice? Thank you very much for your help.

Best regards,