# The window width and level cannot be adjusted for CT images

**URL:** <https://discourse.slicer.org/t/the-window-width-and-level-cannot-be-adjusted-for-ct-images/35175>\
**Category:** Support\
**Created:** [March 30, 2024, 4:14am UTC](https://discourse.slicer.org/t/the-window-width-and-level-cannot-be-adjusted-for-ct-images/35175 "2024-03-30T04:14:23Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![XX\_Chen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/xx_chen/32/69821_2.png) [@XX\_Chen](https://discourse.slicer.org/u/XX_Chen)\
**Post date:** [March 30, 2024, 4:14am UTC](https://discourse.slicer.org/t/the-window-width-and-level-cannot-be-adjusted-for-ct-images/35175/1 "2024-03-30T04:14:23Z")

</div>

Hello,

I recently loaded an abdominal CT image in nii.gz format, but unfortunately, the image cannot be adjusted for window/level, neither manually nor automatically. These CT images are from a public dataset, and I have uploaded one of them to Google Drive for everyone to view.Thank you for your help!

> **[Adrenal\_Ki67\_Seg\_001\_0000.nii.gz](https://drive.google.com/file/d/1oPD0pqaV2zDG4b9SzxPB_DWEaqRreLsg/view?usp=drive_link)**
>
> Google Drive file.

---

<div class="post-metadata">

**Author:** ![muratmaga](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/muratmaga/32/3622_2.png) [@muratmaga](https://discourse.slicer.org/u/muratmaga)\
**Post date:** [March 30, 2024, 4:48am UTC](https://discourse.slicer.org/t/the-window-width-and-level-cannot-be-adjusted-for-ct-images/35175/2 "2024-03-30T04:48:59Z")

</div>

Seems to work fine for me:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/a/c/ac59527c45eb8c9a414b8f487141f90dbf8a3f6a.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/0/1/01562631165850d7ac724caa61a2aea8c594a065.png)

When I drag and dropped it into the Slicer, Slicer read it as a label map due to the. Make sure it is not loaded as labelmap (I think it is due to the \_Seg prefix in the filename). Otherwise, it works fine.

---

<div class="post-metadata">

**Author:** ![XX\_Chen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/xx_chen/32/69821_2.png) [@XX\_Chen](https://discourse.slicer.org/u/XX_Chen)\
**Post date:** [March 30, 2024, 5:28am UTC](https://discourse.slicer.org/t/the-window-width-and-level-cannot-be-adjusted-for-ct-images/35175/3 "2024-03-30T05:28:29Z")

</div>

Thank you Prof. Maga! I followed your advice and removed ‘Seg’ in the file name, and everything went back to normal!