# Extract brain from 3D binary mask images

**URL:** <https://discourse.itk.org/t/extract-brain-from-3d-binary-mask-images/3791>\
**Category:** Beginner Questions\
**Created:** [January 24, 2021, 3:43am UTC](https://discourse.itk.org/t/extract-brain-from-3d-binary-mask-images/3791 "2021-01-24T03:43:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![lisongang-PR](https://discourse.itk.org/user_avatar/discourse.itk.org/lisongang-pr/32/1858_2.png) [@lisongang-PR](https://discourse.itk.org/u/lisongang-PR)\
**Post date:** [January 24, 2021, 3:43am UTC](https://discourse.itk.org/t/extract-brain-from-3d-binary-mask-images/3791/1 "2021-01-24T03:43:23Z")

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I got the 3D mask of brain by using StripTsImageFilter，How can I use mask to extract brain？

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**Author:** ![dzenanz](https://discourse.itk.org/user_avatar/discourse.itk.org/dzenanz/32/1093_2.png) [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Post date:** [January 25, 2021, 2:54pm UTC](https://discourse.itk.org/t/extract-brain-from-3d-binary-mask-images/3791/3 "2021-01-25T14:54:46Z")

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Maybe use [MaskImageFilter](https://itk.org/Doxygen/html/classitk_1_1MaskImageFilter.html), see [example](https://itk.org/ITKExamples/src/Filtering/ImageIntensity/MaskImage/Documentation.html).

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**Author:** ![lisongang-PR](https://discourse.itk.org/user_avatar/discourse.itk.org/lisongang-pr/32/1858_2.png) [@lisongang-PR](https://discourse.itk.org/u/lisongang-PR)\
**Post date:** [January 26, 2021, 12:22pm UTC](https://discourse.itk.org/t/extract-brain-from-3d-binary-mask-images/3791/4 "2021-01-26T12:22:13Z")

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Thank you, sir.  
I’ve used mask to get the brain image！Although I haven’t studied C + +, after consulting the guide book and example,I finally successfully used MaskImageFilter with Python . It’s not easy for me, but it’s worth it.

 ![image](https://discourse.itk.org/uploads/default/original/2X/f/f1dd1399f27f68763160511e1a15963cbb22ed56.png)