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Article is short on details. Do they take pictures with X-rays at three different wavelengths, and then render the three resulting images as individual color ch

Article is short on details. Do they take pictures with X-rays at three different wavelengths, and then render the three resulting images as individual color channels?

tshannon 8y ago
And get 3 times the does of radiation? Seems impractical, but possibly true.
- sametmax 8y ago
  A chest x-ray will give you 0.1 millisieverts. That's the 60th of the dose limit used in scientific facilities like cern. And 200 times less than for radiation workers. It's still ok, it's not supposed to be that of a regular procedure.
  - bonyt 8y ago
    Here is a chart: https://xkcd.com/radiation/ https://xkcd.com/radiation/
  - russdill 8y ago
    It actually looks like it's a CT scan, which is a type of x-ray. A chest CT scan is 7 mSv.
- russdill 8y ago
  X-ray sources are not "monochromatmic" and produce photons across a wide range: http://www.ctlab.geo.utexas.edu/wp-content/uploads/2015/06/Fig02.gif http://www.ctlab.geo.utexas.edu/wp-content/uploads/2015/06/F...
  - Dylan16807 8y ago
    That's not a yes or no. In normal imaging, you need three times as much white light to capture a good color image, because each portion of the film/sensor is only sensitive to a single color. Does this technology avoid that problem?
phyzome 8y ago
> The colours represent different energy levels of the X-ray photons as recorded by the detector http://www.eurekamagazine.co.uk/design-engineering-news/first-3d-colour-x-ray-of-a-human-using-cern-technology/176081/ http://www.eurekamagazine.co.uk/design-engineering-news/firs... There are a bunch of ways to convert that to an RGB display, and I wouldn't be surprised if there were multiple rendering options you can flip between until you find the one that gives you the visual discrimination you're looking for.
- zokier 8y ago
  My particle physics is bit fuzzy, but isn't the energy level of photon directly related to wavelength? So you could do a simple frequency shift (+compress) to visible light spectrum and map them to colors that way? Of course that is the naive approach, and might not be useful from medical perspective.
  - phyzome 8y ago
    Yeah, you could do a linear mapping, but you might want to stretch some regions and compress others. But overall it just sounds like a wavelength transform, yes.

Article is short on details. Do they take pictures with X-rays at three different wavelengths, and then render the three resulting images as individual color channels?

tshannon 8y ago

And get 3 times the does of radiation? Seems impractical, but possibly true.

sametmax 8y ago
A chest x-ray will give you 0.1 millisieverts. That's the 60th of the dose limit used in scientific facilities like cern. And 200 times less than for radiation workers. It's still ok, it's not supposed to be that of a regular procedure.
- bonyt 8y ago
  Here is a chart: https://xkcd.com/radiation/ https://xkcd.com/radiation/
- russdill 8y ago
  It actually looks like it's a CT scan, which is a type of x-ray. A chest CT scan is 7 mSv.
russdill 8y ago
X-ray sources are not "monochromatmic" and produce photons across a wide range: http://www.ctlab.geo.utexas.edu/wp-content/uploads/2015/06/Fig02.gif http://www.ctlab.geo.utexas.edu/wp-content/uploads/2015/06/F...
- Dylan16807 8y ago
  That's not a yes or no. In normal imaging, you need three times as much white light to capture a good color image, because each portion of the film/sensor is only sensitive to a single color. Does this technology avoid that problem?

phyzome 8y ago

> The colours represent different energy levels of the X-ray photons as recorded by the detector http://www.eurekamagazine.co.uk/design-engineering-news/first-3d-colour-x-ray-of-a-human-using-cern-technology/176081/ http://www.eurekamagazine.co.uk/design-engineering-news/firs... There are a bunch of ways to convert that to an RGB display, and I wouldn't be surprised if there were multiple rendering options you can flip between until you find the one that gives you the visual discrimination you're looking for.

zokier 8y ago
My particle physics is bit fuzzy, but isn't the energy level of photon directly related to wavelength? So you could do a simple frequency shift (+compress) to visible light spectrum and map them to colors that way? Of course that is the naive approach, and might not be useful from medical perspective.
- phyzome 8y ago
  Yeah, you could do a linear mapping, but you might want to stretch some regions and compress others. But overall it just sounds like a wavelength transform, yes.