In DepthOptics

X-ray ‘ghost images’ could cut radiation doses

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Science  30 Mar 2018:
Vol. 359, Issue 6383, pp. 1452
DOI: 10.1126/science.359.6383.1452

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On its own, a single-pixel camera captures pictures that are pretty dull: squares that are completely black, completely white, or some shade of gray in between. All it does, after all, is detect brightness. Yet by connecting a single-pixel camera to a patterned light source, a team of physicists in China has made detailed x-ray images using a statistical technique called ghost imaging, first pioneered 20 years ago in infrared and visible light. Researchers in the field say future versions of this system could take clear x-ray photographs with cheap cameras—no need for lenses and multipixel detectors—and less cancer-causing radiation than conventional techniques.

  • * Sophia Chen is a journalist in Tucson, Arizona.

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