Near monochromatic X-rays for digital slot-scan mammography: initial findings

European Radiology
F DiekmannB Hamm

Abstract

X-ray spectra are composed of a broad bremsspectrum and anode-characteristic emission lines. In mammography typically molybdenum (Mo), rhodium (Rh) or tungsten (W) anodes are used in combination with Mo, Rh or aluminium filters. Only the photons with energies between 17 and 22 keV of the resulting spectrum are suitable for the soft tissue imaging needed for mammography. The aim of this article is to present first results obtained with a monochromator module mounted at the exit of the X-ray tube of a conventional clinical mammography unit. The experimental setup consists of a Siemens Mammomat 300, an X-ray monochromator module and a linear array detector for image acquisition. The technique is similar to the slot-scan technique known from digital mammography. The experimental machine allows to obtain images both with polychromatic and monochromatic X-rays. Initial evaluation of the system was performed by examination of a contrast-detail phantom (CD-MAM-phantom, Nijmegen, The Netherlands). Images done with the new monochromatic technique were compared to images of the phantom done with polychromatic spectra, with film-screen mammography as well as with digital mammography. The new technique with monochromatic slot-scan mammograp...Continue Reading

Citations

Mar 4, 2005·Der Radiologe·R Schulz-WendtlandW Bautz
Aug 8, 2008·Future Oncology·Vineeta SinghAnita Bourke
Sep 11, 2012·Medical Physics·A MallioriN Pallikarakis
Nov 1, 2013·Physics in Medicine and Biology·Bernhard H MüllerThorsten R C Johnson
Aug 2, 2014·Physics in Medicine and Biology·A MallioriN Pallikarakis

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