# Expanding volume without squeezing others

**URL:** <https://discourse.slicer.org/t/expanding-volume-without-squeezing-others/9704>\
**Category:** Support\
**Created:** [January 3, 2020, 1:30pm UTC](https://discourse.slicer.org/t/expanding-volume-without-squeezing-others/9704 "2020-01-03T13:30:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![annigilus](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@annigilus](https://discourse.slicer.org/u/annigilus)\
**Post date:** [January 3, 2020, 1:30pm UTC](https://discourse.slicer.org/t/expanding-volume-without-squeezing-others/9704/1 "2020-01-03T13:30:39Z")

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How can I expand one volume without squeezing others volumes nearby? Can I overlap volumes one to another?  
And hov can I combine two different volumes to the one new? (For example, I have two volumes of femoral heads named “FH\_left” and “FH\_right” and I need it one volume “FH\_all”)

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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:** [January 3, 2020, 1:36pm UTC](https://discourse.slicer.org/t/expanding-volume-without-squeezing-others/9704/2 "2020-01-03T13:36:59Z")

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You need to resample the volumes to have the same geometry (origin, spacing, axis directions - using “Crop volume” module or one of the image resample modules) then add them (using “Add scalar volume” module or using numpy array operations). See more details in these posts:

- [Landmark registration and combining intenstities of fixed and moving volume](https://discourse.slicer.org/t/landmark-registration-and-combining-intenstities-of-fixed-and-moving-volume/7106)
- [Is it possible to view more than two image volumes at the same time in slice viewers?](https://discourse.slicer.org/t/is-it-possible-to-view-more-than-two-image-volumes-at-the-same-time-in-slice-viewers/8738)