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
Schlagworte:	BASIC ELECTRONIC CIRCUITRY DIAGNOSIS ELECTRICITY HUMAN NECESSITIES HYGIENE IDENTIFICATION MEASUREMENT OF NUCLEAR OR X-RADIATION MEASURING MEDICAL OR VETERINARY SCIENCE PHYSICS PULSE TECHNIQUE SURGERY TESTING
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Beschreibung
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.