# How to create nii.gz inside LabelsTr directory by using 3D Slicer or python script? 

**URL:** <https://discourse.slicer.org/t/how-to-create-nii-gz-inside-labelstr-directory-by-using-3d-slicer-or-python-script/40729>\
**Category:** Support\
**Tags:** python\
**Created:** [December 17, 2024, 5:42pm UTC](https://discourse.slicer.org/t/how-to-create-nii-gz-inside-labelstr-directory-by-using-3d-slicer-or-python-script/40729 "2024-12-17T17:42:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Derek\_Wang](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/derek_wang/32/78608_2.png) [@Derek\_Wang](https://discourse.slicer.org/u/Derek_Wang)\
**Post date:** [December 17, 2024, 5:42pm UTC](https://discourse.slicer.org/t/how-to-create-nii-gz-inside-labelstr-directory-by-using-3d-slicer-or-python-script/40729/1 "2024-12-17T17:42:24Z")

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I use nnunet to train skulls. I have collected 50 skull dicom datasets and converted them into nii.gz formats. I was unclear how to create nii.gz inside LabelsTr directory by using 3D Slicer or python script? Thanks a lot!