# Pyradiomics LoG filter voxel or physical space?

**URL:** <https://discourse.slicer.org/t/pyradiomics-log-filter-voxel-or-physical-space/19944>\
**Category:** Radiomics\
**Created:** [October 1, 2021, 2:23am UTC](https://discourse.slicer.org/t/pyradiomics-log-filter-voxel-or-physical-space/19944 "2021-10-01T02:23:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![GVK](https://avatars.discourse-cdn.com/v4/letter/g/9de053/32.png) [@GVK](https://discourse.slicer.org/u/GVK)\
**Post date:** [October 1, 2021, 2:23am UTC](https://discourse.slicer.org/t/pyradiomics-log-filter-voxel-or-physical-space/19944/1 "2021-10-01T02:23:25Z")

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Operating system:na  
Slicer version:na  
Expected behavior:na  
Actual behavior:na

In pyradiomics default settings, are the settings of the LoG filter defined in voxel space or in physical space?

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**Author:** ![JoostJM](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/joostjm/32/1091_2.png) [@JoostJM](https://discourse.slicer.org/u/JoostJM)\
**Post date:** [January 11, 2022, 12:20pm UTC](https://discourse.slicer.org/t/pyradiomics-log-filter-voxel-or-physical-space/19944/2 "2022-01-11T12:20:52Z")

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Phyisical space. Sigma is in mm