MODELLING PILEUP EFFECT FOR USE IN SPECTRAL IMAGING

Disclosed is a method for modelling a distorted energy spectrum in a multi-energy x-ray CT imaging system using probability distribution functions, the method including taking open beam measurements across a range of fluxes, estimating true interaction rates from said fluxes, calculating the probabi...

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Bibliographische Detailangaben
Hauptverfasser: ATHARIFARD, Ali, BUTLER, Philip Howard, BUTLER, Anthony Philip Howard
Format: Patent
Sprache:eng
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Zusammenfassung:Disclosed is a method for modelling a distorted energy spectrum in a multi-energy x-ray CT imaging system using probability distribution functions, the method including taking open beam measurements across a range of fluxes, estimating true interaction rates from said fluxes, calculating the probabilities of photons being counted, pileup order, and counts recorded to produce a model of the distorted energy spectrum. Also described are computer implemented methods and systems for modelling distortions and optimizing material images produced from multi-energy x-ray CT scanning systems using the modelling techniques.