Abstract
The shape of the energy spectrum produced by an x-ray tube has a greatimportance in mammography. Many anode-filtration combinations have beenproposed to obtain the most effective spectrum shape for the image quality-doserelationship. On the other hand, third generation synchrotrons such as theEuropean Synchrotron Radiation Facility in Grenoble are able to produce a highflux of monoenergetic radiation. It is thus a powerful tool to study theeffect of beam energy on image quality and dose in mammography.An objective method was used to evaluate image quality and dose in mammographywith synchrotron radiation and to compare them to standard conventional units.It was performed systematically in the energy range of interest formammography through the evaluation of a global image quality index and throughthe measurement of the mean glandular dose. Compared to conventionalmammography units, synchrotron radiation shows a great improvement of theimage quality-dose relationship, which is due to the beam monochromaticityand to the high intrinsic collimation of the beam, which allows the use of a slitinstead of an anti-scatter grid for scatter rejection.
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