Energy filtering with x-ray lenses: Optimization for photon-counting mammography
2010 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, E-ISSN 1742-3406, Vol. 139, 339-342 p.Article in journal (Refereed) Published
Chromatic properties of the multi-prism and prism-array x-ray lenses (MPL and PAL) can potentially be utilized for efficient energy filtering and dose reduction in mammography. The line-shaped foci of the lenses are optimal for coupling to photon-counting silicon strip detectors in a scanning system. A theoretical model was developed and used to investigate the benefit of two lenses compared to an absorption-filtered reference system. The dose reduction of the MPL filter was 15% compared to the reference system at matching scan time, and the spatial resolution was higher. The dose of the PAL-filtered system was found to be 20% lower than for the reference system at equal scan time and resolution, and only 20% higher than for a monochromatic beam. An investigation of some practical issues remains, including the feasibility of brilliant-enough x-ray sources and manufacturing of a polymer PAL.
Place, publisher, year, edition, pages
2010. Vol. 139, 339-342 p.
x-ray imaging, mammography, x-ray optics, multiprism lens, prism-array lens, energy filtering, radiation dose, spatial resolution, exposure time
Other Engineering and Technologies not elsewhere specified Atom and Molecular Physics and Optics Radiology, Nuclear Medicine and Medical Imaging Medical Laboratory and Measurements Technologies
IdentifiersURN: urn:nbn:se:kth:diva-11640DOI: 10.1093/rpd/ncq049ISI: 000277738200064ScopusID: 2-s2.0-77953329327OAI: oai:DiVA.org:kth-11640DiVA: diva2:278580
QC 20100714. Uppdaterad från submitted till published (20100714)2009-11-272009-11-272011-01-12Bibliographically approved