# Not able to select masks for registration in elastix

**URL:** <https://discourse.slicer.org/t/not-able-to-select-masks-for-registration-in-elastix/35870>\
**Category:** Support\
**Tags:** registration, elastix\
**Created:** [May 2, 2024, 12:48pm UTC](https://discourse.slicer.org/t/not-able-to-select-masks-for-registration-in-elastix/35870 "2024-05-02T12:48:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Chih-Ying-Huang](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chih-ying-huang/32/70266_2.png) [@Chih-Ying-Huang](https://discourse.slicer.org/u/Chih-Ying-Huang)\
**Post date:** [May 2, 2024, 12:48pm UTC](https://discourse.slicer.org/t/not-able-to-select-masks-for-registration-in-elastix/35870/1 "2024-05-02T12:48:34Z")

</div>

Operating system: Windows10  
Slicer version: 5.6.2  
Expected behavior: Registration between 2 abdominal CT image with masks  
Actual behavior:  
After import my binary mask as segmentations in slicer, I was not able to find a mask to select, as the following image shows:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/a/eaa0f2609d48981c05e12416aacb3e3b1f46b50f.png)

Is there anything I missed?