# Volumes cropping and comparing

**URL:** <https://discourse.slicer.org/t/volumes-cropping-and-comparing/31295>\
**Category:** Support\
**Created:** [August 22, 2023, 4:30pm UTC](https://discourse.slicer.org/t/volumes-cropping-and-comparing/31295 "2023-08-22T16:30:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![DrAssadawy](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/drassadawy/32/14155_2.png) [@DrAssadawy](https://discourse.slicer.org/u/DrAssadawy)\
**Post date:** [August 22, 2023, 4:30pm UTC](https://discourse.slicer.org/t/volumes-cropping-and-comparing/31295/1 "2023-08-22T16:30:08Z")

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How can I subtract two volumes ? and the best methods of volume registration?