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Spectral shaping for photon counting digital mammography
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- Åslund, Magnus (author)
- KTH,Fysik
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- Fredenberg, Erik, PhD, 1979- (author)
- KTH,Medicinsk bildfysik
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- Cederström, Björn (author)
- KTH,Fysik
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- (creator_code:org_t)
- Elsevier BV, 2007
- 2007
- English.
- In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 580:2, s. 1046-1049
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Medicinteknik -- Medicinsk laboratorie- och mätteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Medical Engineering -- Medical Laboratory and Measurements Technologies (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Keyword
- mammography; photon counting; spectrum; filter; X-ray optics; multi-prism lens
- Medical engineering
- Medicinsk teknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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