# Segment registration on cropped volumes

**URL:** <https://discourse.slicer.org/t/segment-registration-on-cropped-volumes/30910>\
**Category:** Support\
**Tags:** registration\
**Created:** [August 1, 2023, 3:27pm UTC](https://discourse.slicer.org/t/segment-registration-on-cropped-volumes/30910 "2023-08-01T15:27:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Malika](https://avatars.discourse-cdn.com/v4/letter/m/e47c2d/32.png) [@Malika](https://discourse.slicer.org/u/Malika)\
**Post date:** [August 1, 2023, 3:27pm UTC](https://discourse.slicer.org/t/segment-registration-on-cropped-volumes/30910/1 "2023-08-01T15:27:41Z")

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Hi, I’m trying to register two volumes by segments with the help of Segment Registration. A fixed volume and the corresponding segmentation mask have more segments compared to a moving volume (19 vs 8). An issue arises when I select the same segment to register on in both volumes: it stretches the cropped (moving) volume and fits it to the whole fixed volume, even though the moving volume corresponds to a lower part of the fixed volume.

Please see the screenshots attached, where the bottom right picture is the fixed volume, bottom left is a registered moving volume, top left is the original moving volume and top right is a registered 3d model. How can I fix this? Thank you.

 ![Screenshot from 2023-08-01 11-00-58](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/0/500a7bd3325e982e52e38ea369540322ccb24152.jpeg)