This
image (1) shows a wrist with more muscle, less visible bone, almost no fat and a
clearly-articulated watch. It's important to note that these aren't
"true-color" X-ray scans as most people would commonly understand the
term. As the inventors of the sensor that was used to make these images
described in a 2015 paper in the journal IEEE Transactions on Medical Imaging
and on the company's website, the colors in these images are applied based on
the computer's detection of different wavelengths of X-rays passing through
different substances. There are, however, no "true" red X-rays or
"true" white X-rays; the device's programmers assign different colors
to different detected body parts. (What human brains interpret as color comes
from different wavelengths of light in the visual spectrum bouncing off
objects. Visible light is also a form of electromagnetic radiation but is
lower-energy than X-ray light.).
A New
Zealand company called Mars Bioimaging has developed a new type of medical
imaging scanner that works in a similar fashion, but borrows technology
developed for the Large Hadron Collider at CERN to produce far more detailed
results. The Medipix3 chip works similar to the sensor in your digital camera,
but it detects and counts the particles hitting each pixel when a shutter
opens.
When used
in the new scanner developed by father and son scientists Phil and Anthony
Butler from the Universities of Canterbury and Otago in New Zealand, the
Medipix3 chip, enhanced with custom data-processing algorithms, can detect the
change in wavelengths as x-rays pass through different materials in the body.
This allows the scanner to differentiate bone, muscle, fat, liquids, and all
the other material in the human body, while additional software uses that data
to produce stunning full-color images that allow a three-dimensional view of
the inside of the body.
taken from external source....
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