The team moved the motorized stage to irradiate the razor with intensity fluctuation patterns introduced at various positions of the sandpaper. They then measured the total intensity after the beam hit the object by using the single-pixel detector.

By synchronizing the measurements with the blade’s movements, the researchers correlated the reference pattern with intensity measured by the single-pixel detector for each position of the blade to create a final image. This, in effect, created a movie of the moving blade by performing image reconstruction frame-by-frame to capture the blade at different positions. The movie clearly showed the motion with a spatial resolution of about 40 microns, which is nearly an order of magnitude better than the resolution of currently available medical imaging systems.

Shwartz and Sefi say the technique can be used with any X-ray source and can enable clinicians to use X-rays to measure fast dynamics outside the lab. They are continuing to make improvements to the overall system and the image reconstruction algorithm for greater resolution and shorter measurement times.

“We are seeking to improve the reconstruction algorithm to reduce the number of diffuser scans,” they said. “This, in effect, will reduce overall imaging time while improving spatial resolution by fabricating diffusers with smaller features.

The findings were published in Optics Express.

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