# Does Slicer use Interpolation when rendering DICOMs

**URL:** <https://discourse.slicer.org/t/does-slicer-use-interpolation-when-rendering-dicoms/3303>\
**Category:** Support\
**Tags:** rendering\
**Created:** [June 26, 2018, 1:52pm UTC](https://discourse.slicer.org/t/does-slicer-use-interpolation-when-rendering-dicoms/3303 "2018-06-26T13:52:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sboebin](https://avatars.discourse-cdn.com/v4/letter/s/f0a364/32.png) [@sboebin](https://discourse.slicer.org/u/sboebin)\
**Post date:** [June 26, 2018, 1:52pm UTC](https://discourse.slicer.org/t/does-slicer-use-interpolation-when-rendering-dicoms/3303/1 "2018-06-26T13:52:31Z")

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I am having some thresholding issues that I think may be associated with how slicer renders the DICOMs. Does slicer use an interpolation algorithm when rendering DICOMs? Or does it retain the image intensity?

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**Author:** ![ihnorton](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/ihnorton/32/9_2.png) [@ihnorton](https://discourse.slicer.org/u/ihnorton)\
**Post date:** [June 27, 2018, 12:12pm UTC](https://discourse.slicer.org/t/does-slicer-use-interpolation-when-rendering-dicoms/3303/2 "2018-06-27T12:12:49Z")

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You can turn on/off in-plane interpolation with the following button:

![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/9/0/90118e34cffb18dba8f97c6e56fc1b9d45c0678c.png)