Spectral shaping for photon counting digital mammography
2007 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, Vol. 580, no 2, 1046-1049 p.Article in journal (Refereed) Published
The spectral shaping properties of conventional filters have been evaluated for a photon counting digital mammography system, and the result has been compared with the theoretical spectrum from a multi-prism X-ray lens (MPL). The absorption filters and the MPL were evaluated using a theoretical model of the system which has been verified experimentally. The spectral shaping performance is quantified with the spectral quantum efficiency (SQE), calculated as the polychromatic signal-difference-to-noise ratio (SDNR) squared over the optimal monochromatic SDNR squared at the same average glandular dose. The MPL increases the SQE by 25% compared to the investigated absorption filter when compared with a Tungsten anode. This translates into a potential dose reduction of 20% at maintained SDNR.
Place, publisher, year, edition, pages
2007. Vol. 580, no 2, 1046-1049 p.
mammography; photon counting; spectrum; filter; X-ray optics; multi-prism lens
Medical Laboratory and Measurements Technologies
IdentifiersURN: urn:nbn:se:kth:diva-6940DOI: 10.1016/j.nima.2007.06.087ISI: 000250128000046ScopusID: 2-s2.0-34548514027OAI: oai:DiVA.org:kth-6940DiVA: diva2:11795
QC 20100825. Uppdaterad från Accepted till Published 20100825. Konferens: 3rd International Conference on Imaging Techniques in Subatomic Physics, Astrophysics, Medicine, Biology and Industry, Stockholm, SWEDEN, JUN 27-30, 2006.2007-03-302007-03-302010-08-25Bibliographically approved