Record number :
2207833
Title of article :
Spectral shaping for photon counting digital mammography
Author/Authors :
إslund، نويسنده , , Magnus and Fredenberg، نويسنده , , Erik and Cederstrِm، نويسنده , , Bjِrn and Danielsson، نويسنده , , Mats، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
4
From page :
1046
To page :
1049
Abstract :
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.
Keywords :
mammography , Photon counting , Spectrum , Filter , X-ray optics , Multi-prism lens
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Journal title :
Nuclear Instruments and Methods in Physics Research Section A
Serial Year :
2007
Link To Document :
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