# Slices selection in pyradiomics

**URL:** <https://discourse.slicer.org/t/slices-selection-in-pyradiomics/43361>\
**Category:** Support\
**Created:** [June 15, 2025, 2:34pm UTC](https://discourse.slicer.org/t/slices-selection-in-pyradiomics/43361 "2025-06-15T14:34:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![iliass\_B25](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/iliass_b25/32/80422_2.png) [@iliass\_B25](https://discourse.slicer.org/u/iliass_B25)\
**Post date:** [June 15, 2025, 2:34pm UTC](https://discourse.slicer.org/t/slices-selection-in-pyradiomics/43361/1 "2025-06-15T14:34:10Z")

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I combine the use of SimpleITK with PyRadiomics to extract radiomic features. The thing is, I have a large number of cases, so for the GTV, I take 3 slices above and 3 slices below. Otherwise, the extraction process can take hours. However, I don’t know exactly how many slices I should take above and below in order not to lose information. Has anyone else faced this problem?