# Why does Brain Tumor Segmentation type of dataset have no values in the array

**URL:** <https://discourse.slicer.org/t/why-does-brain-tumor-segmentation-type-of-dataset-have-no-values-in-the-array/25205>\
**Category:** Support\
**Created:** [September 11, 2022, 6:49pm UTC](https://discourse.slicer.org/t/why-does-brain-tumor-segmentation-type-of-dataset-have-no-values-in-the-array/25205 "2022-09-11T18:49:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![luna1](https://avatars.discourse-cdn.com/v4/letter/l/7bcc69/32.png) [@luna1](https://discourse.slicer.org/u/luna1)\
**Post date:** [September 11, 2022, 6:49pm UTC](https://discourse.slicer.org/t/why-does-brain-tumor-segmentation-type-of-dataset-have-no-values-in-the-array/25205/1 "2022-09-11T18:49:25Z")

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i have been trying to work with BRATS dataset like this one [Brain Tumor Segmentation | Kaggle](https://www.kaggle.com/datasets/andrewmvd/brain-tumor-segmentation-in-mri-brats-2015) but when i try to load it in 3d slicer then type this command in the python interpretor it tells me that the array only contains 0

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/3/e30363168c31089f025fba4f9bb73540a14a12f8.jpeg)

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [September 11, 2022, 7:25pm UTC](https://discourse.slicer.org/t/why-does-brain-tumor-segmentation-type-of-dataset-have-no-values-in-the-array/25205/2 "2022-09-11T19:25:08Z")

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The BraTS data is skull stripped, so the entire background is zeros. When you print a numpy array you only see the start and end of the arrays, so probably all you are seeing is background. You can use other numpy operations, like `nnn.mean()` or `nnn.max()` to confirm there are values.