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

Brydegaard, Mikkel LU and Svanberg, Sune LU (2010) In American Journal of Physics 78(2). p.170-175
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
physics education, Wien effect, X-ray spectra, X-ray imaging, computerised tomography, laboratories, SoTL
categories
Higher Education
in
American Journal of Physics
volume
78
issue
2
pages
170 - 175
publisher
American Association of Physics Teachers
external identifiers
  • wos:000273597200008
  • scopus:74249114808
ISSN
0002-9505
DOI
10.1119/1.3248356
language
English
LU publication?
yes
id
d53346e8-03bb-4e33-83bf-a158773dc6b3 (old id 1547712)
date added to LUP
2010-02-23 13:02:20
date last changed
2018-05-29 11:42:45
@article{d53346e8-03bb-4e33-83bf-a158773dc6b3,
  abstract     = {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.},
  author       = {Brydegaard, Mikkel and Svanberg, Sune},
  issn         = {0002-9505},
  keyword      = {physics education,Wien effect,X-ray spectra,X-ray imaging,computerised tomography,laboratories,SoTL},
  language     = {eng},
  number       = {2},
  pages        = {170--175},
  publisher    = {American Association of Physics Teachers},
  series       = {American Journal of Physics},
  title        = {Simulation of multispectral x-ray imaging scenarios by Wien shift optical spectroscopy},
  url          = {http://dx.doi.org/10.1119/1.3248356},
  volume       = {78},
  year         = {2010},
}