# CT reconstruction artifacts?

**URL:** <https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677>\
**Category:** Support\
**Created:** [April 7, 2026, 7:27pm UTC](https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677 "2026-04-07T19:27:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mau\_igna\_06](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mau_igna_06/32/9056_2.png) [@mau\_igna\_06](https://discourse.slicer.org/u/mau_igna_06)\
**Post date:** [April 7, 2026, 7:27pm UTC](https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677/1 "2026-04-07T19:27:16Z")

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Hi,

I’d like to know what is the cause of the apparent artifact on the skin seen on the sagittal view of the picture below (circled by the CC curve)

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/a/fab287a76a0b1d304527798c36cac23bbc3c2b05.jpeg)

Thank you very much

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [April 7, 2026, 8:24pm UTC](https://discourse.slicer.org/t/ct-reconstruction-artifacts/46677/2 "2026-04-07T20:24:25Z")

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That happens when the patient is breathing during the scan (while the table moves through the scan plane). Usually the tech tells the patient to hold their breath, but some people are nervous and hyperventilate a bit.