PMID: 11339737May 8, 2001Paper

Spatial resolution measurements in quasimonochromatic x rays with mosaic crystals for mammography application

Medical Physics
M GambacciniA Del Guerra

Abstract

A novel x-ray source for mammography application is being investigated. Quasimonochromatic x rays have been produced via Bragg diffraction with a W-anode x-ray tube and a graphite mosaic crystal array. The system provides 18 keV x rays with an energy resolution deltaE/E approximately equals 0.12. A thorough analysis of the spatial resolution of the system has been performed in order to understand and quantify the effect of the introduction of an active optical element such as a mosaic crystal in the x-ray path. The focal spot of the source and its emission properties have been studied by using the slit camera method. Experiments have shown that the introduction of a mosaic crystal in the optical path modifies the resolution properties of the Bragg diffraction-based radiography system. Along the direction perpendicular to the diffraction plane the resolution properties of the imaging system mainly depend on the x-ray tube focal spot size and position. Along the diffraction plane the focal spot size depends on mosaic characteristics and on the geometrical setup. Hence, it could be modified by setting the appropriate experimental conditions.

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Feb 12, 2002·Physics in Medicine and Biology·M MarzianiM Gambaccini

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Citations

Sep 10, 2003·Investigative Radiology·Rüdiger LawaczeckHanns-Joachim Weinmann
Dec 19, 2003·Physics in Medicine and Biology·P BaldelliM Gambaccini
Sep 11, 2004·Physics in Medicine and Biology·A SarnelliM Gambaccini
May 7, 2005·Physics in Medicine and Biology·P BaldelliM Gambaccini
Jul 30, 2010·Physics in Medicine and Biology·F Van den HeuvelS Nuyts
Feb 12, 2002·Physics in Medicine and Biology·M MarzianiM Gambaccini

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