Is it possible to see Newton rings in CT (xray) images?

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SUMMARY

Newton's rings interference patterns can indeed appear in transverse CT images, even when using x-rays, contrary to the common belief that they are exclusive to visible light. The formation of these rings is contingent upon the geometry of the imaging setup, particularly the use of a spherical lens over a reflective surface. Additionally, motion artifacts, such as those caused by breathing during scans, can also produce similar ripple effects in CT images. Understanding the specific conditions under which these patterns arise is crucial for accurate interpretation.

PREREQUISITES
  • Understanding of Newton's rings and their formation
  • Familiarity with CT imaging techniques
  • Knowledge of x-ray optics
  • Basic principles of motion artifacts in imaging
NEXT STEPS
  • Research the principles of Newton's rings in optical systems
  • Explore the effects of motion artifacts in CT imaging
  • Learn about the geometry of lens systems in x-ray applications
  • Investigate advanced x-ray optics techniques for clearer imaging
USEFUL FOR

Radiologists, medical imaging technicians, and researchers in x-ray optics who are interested in understanding interference patterns and improving image quality in CT scans.

ireland01
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I have seen what looks like Newtons rings interference pattern in transverse CT images of 2 solid water block on
top of each other. My understanding is that Newtons rings occur in visible light eg photography or scanners. Can anyone shed some light on this? :)
 
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It is certainly possible for Newton's rings to form from any kind of light - including x-rays. The trick it to work out what sort of lens to use to demonstrate this.
You get the rings from light passing through a spherical lens on a reflective plane surface ... would the geometry of the "two blocks of water" be consistent with this?

We need more information to work out what is causing the pattern you see - there are lots of possible causes of ripple effects in an image.
You may like to look at:
http://www.x-ray-optics.de/index.php?option=com_content&view=article&id=55&Itemid=63&lang=en
 
Last edited by a moderator:
ireland01 said:
I have seen what looks like Newtons rings interference pattern in transverse CT images of 2 solid water block on
top of each other. My understanding is that Newtons rings occur in visible light eg photography or scanners. Can anyone shed some light on this? :)

If I understand you correctly, those are artifacts produced by breathing (motion) during a scan:
http://images.radiopaedia.org/images/3234993/142d6c6760890cec00173fad02b622_gallery.png
http://images.radiopaedia.org/images/6109236/da8a628b604924c56bb5a7b2ba84d8_big_gallery.JPG

If I am misunderstanding, can you post/link to an image?
 

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