Simulation of multispectral x-ray imaging scenarios by Wien shift optical spectroscopy
Författare
Summary, in 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.
Avdelning/ar
Publiceringsår
2010
Språk
Engelska
Sidor
170-175
Publikation/Tidskrift/Serie
American Journal of Physics
Volym
78
Issue
2
Dokumenttyp
Artikel i tidskrift
Förlag
American Association of Physics Teachers
Ämne
- Atom and Molecular Physics and Optics
Nyckelord
- physics education
- Wien effect
- X-ray spectra
- X-ray imaging
- computerised tomography
- laboratories
- SoTL
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0002-9505