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Simulation of multispectral x-ray imaging scenarios by Wien shift optical spectroscopy

Author:
  • Mikkel Brydegaard
  • Sune Svanberg
Publishing year: 2010
Language: English
Pages: 170-175
Publication/Series: American Journal of Physics
Volume: 78
Issue: 2
Document type: Journal article
Publisher: American Association of Physics Teachers

Abstract english

The acquisition of multispectral x-ray images and the treatment of such data are essential for understanding many devices that we encounter in everyday life. Examples include computerized tomography in hospitals and scanners at airports. X-ray devices remain impractical for undergraduate laboratories because of their considerable cost and the risk of exposure to ionizing radiation. One way to acquire spectral information and thus constituent-discriminating data in x-ray imaging is to alter the spectral contents of the illuminating x-ray source, which can be achieved by changing the x-ray tube voltage and thus energetically displacing the bremsstrahlung. A similar effect occurs in the emission from a black-body radiator in the optical and infrared regions when altering the temperature. We illustrate how to simulate the x-ray scenario with a webcam and an ordinary light bulb. Insight into how chemical and physical information regarding objects can be obtained in multispectral imaging supported by multivariate analysis is gained.

Keywords

  • Atom and Molecular Physics and Optics
  • physics education
  • Wien effect
  • X-ray spectra
  • X-ray imaging
  • computerised tomography
  • laboratories
  • SoTL

Other

Published
  • ISSN: 0002-9505
Mikkel Brygdegaard
E-mail: mikkel.brydegaard [at] forbrf.lth.se

Associate senior lecturer

Combustion Physics

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