# I want to use the software to do superimposition of CBCT files. but when I insert my CBCT in nrrd format, it apear only black and white black not the whole image. as in the picture i attached. what should I do?

**URL:** <https://discourse.slicer.org/t/i-want-to-use-the-software-to-do-superimposition-of-cbct-files-but-when-i-insert-my-cbct-in-nrrd-format-it-apear-only-black-and-white-black-not-the-whole-image-as-in-the-picture-i-attached-what-should-i-do/30305>\
**Category:** Support\
**Tags:** segmentation\
**Created:** [June 29, 2023, 4:16pm UTC](https://discourse.slicer.org/t/i-want-to-use-the-software-to-do-superimposition-of-cbct-files-but-when-i-insert-my-cbct-in-nrrd-format-it-apear-only-black-and-white-black-not-the-whole-image-as-in-the-picture-i-attached-what-should-i-do/30305 "2023-06-29T16:16:45Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![YOU\_DDS](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/you_dds/32/68674_2.png) [@YOU\_DDS](https://discourse.slicer.org/u/YOU_DDS)\
**Post date:** [June 29, 2023, 4:16pm UTC](https://discourse.slicer.org/t/i-want-to-use-the-software-to-do-superimposition-of-cbct-files-but-when-i-insert-my-cbct-in-nrrd-format-it-apear-only-black-and-white-black-not-the-whole-image-as-in-the-picture-i-attached-what-should-i-do/30305/1 "2023-06-29T16:16:46Z")

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Operating system:  
Slicer version:  
Expected behavior:

 ![스크린샷(12)](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/1/f163b6261666055578b2b25773c634a450549976.png)

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**Author:** ![gcsharp](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/gcsharp/32/863_2.png) [@gcsharp](https://discourse.slicer.org/u/gcsharp)\
**Post date:** [June 29, 2023, 4:58pm UTC](https://discourse.slicer.org/t/i-want-to-use-the-software-to-do-superimposition-of-cbct-files-but-when-i-insert-my-cbct-in-nrrd-format-it-apear-only-black-and-white-black-not-the-whole-image-as-in-the-picture-i-attached-what-should-i-do/30305/2 "2023-06-29T16:58:03Z")

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It may be that the image was converted incorrectly, or it could be a display issue.

In the Volumes module, you can look at “Scalar Type” and “Scalar Range.” You can also look at the histogram. Further, the data probe will show you the intensity at the position of the cursor. Do these values make sense for your image?

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<div class="post-metadata">

**Author:** ![YOU\_DDS](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/you_dds/32/68674_2.png) [@YOU\_DDS](https://discourse.slicer.org/u/YOU_DDS)\
**Post date:** [August 1, 2023, 12:40am UTC](https://discourse.slicer.org/t/i-want-to-use-the-software-to-do-superimposition-of-cbct-files-but-when-i-insert-my-cbct-in-nrrd-format-it-apear-only-black-and-white-black-not-the-whole-image-as-in-the-picture-i-attached-what-should-i-do/30305/3 "2023-08-01T00:40:08Z")

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Thank for your help!!