Sökning: id:"swepub:oai:DiVA.org:kth-160897" >
Optimal frequency-b...
Optimal frequency-based weighting for spectral x-ray projection imaging
-
- Yveborg, Moa (författare)
- KTH,Medicinsk bildfysik
-
- Persson, Mats (författare)
- KTH,Medicinsk bildfysik
-
- Bornefalk, Hans (författare)
- KTH,Medicinsk bildfysik
-
(creator_code:org_t)
- 2015
- 2015
- Engelska.
-
Ingår i: IEEE Transactions on Medical Imaging. - 0278-0062 .- 1558-254X. ; 34:3, s. 779-787
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- Detectability index
- Hotelling SDNR
- multiple-bin
- photon counting
- spectral X-ray imaging
- Medical Technology
- Medicinsk teknologi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas