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Optimal frequency-b...
Optimal frequency-based weighting for spectral x-ray projection imaging
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- Yveborg, Moa (author)
- KTH,Medicinsk bildfysik
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- Persson, Mats (author)
- KTH,Medicinsk bildfysik
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- Bornefalk, Hans (author)
- KTH,Medicinsk bildfysik
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(creator_code:org_t)
- 2015
- 2015
- English.
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In: IEEE Transactions on Medical Imaging. - 0278-0062 .- 1558-254X. ; 34:3, s. 779-787
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Abstract
Subject headings
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- The purpose of this work is to derive a weighting scheme that maximizes the frequency-dependent ideal observer signal-difference-to-noise ratio, commonly referred to as detectability index or Hotelling-SDNR, for spectral X-ray projection imaging. Starting from basic statistical decision theory, optimal frequency-dependent weights are derived for a multiple-bin system and the Hotelling-SDNR calculated. A 28% increase in detectability index is found for high frequency objects when applying optimal frequency-dependent weights instead of pixel-based weights to a simplified model of a silicon detector, decreasing towards 0% for low frequency objects. Simulation results indicate a potentially large increase in detectability for high-frequency object imaging using silicon detectors, thus meriting further evaluations on a real system.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Detectability index
- Hotelling SDNR
- multiple-bin
- photon counting
- spectral X-ray imaging
- Medical Technology
- Medicinsk teknologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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