# Volume rendering and multiplanar reconstruction

**URL:** <https://discourse.slicer.org/t/volume-rendering-and-multiplanar-reconstruction/20955>\
**Category:** Support\
**Tags:** segmentation, dicom\
**Created:** [December 7, 2021, 9:42pm UTC](https://discourse.slicer.org/t/volume-rendering-and-multiplanar-reconstruction/20955 "2021-12-07T21:42:48Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![mikebind](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mikebind](https://discourse.slicer.org/u/mikebind)\
**Post date:** [December 8, 2021, 11:00pm UTC](https://discourse.slicer.org/t/volume-rendering-and-multiplanar-reconstruction/20955/2 "2021-12-08T23:00:54Z")

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Are you creating the DICOM headers yourself? Slicer does not use the “Slice Thickness” to set the slice spacing, see discussion here:

> [@Slicer loads wrong image spacing](https://discourse.slicer.org/t/slicer-loads-wrong-image-spacing/453/4):
>
> The out of plane spacing is defined by the distance between the ImagePositionPatient of adjacent slices, not by the SliceThickness, which can be different for a variety of reasons.

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_[View the full topic](https://discourse.slicer.org/t/volume-rendering-and-multiplanar-reconstruction/20955)._