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AssigneePrismatic Sensors AB
InventorsLouis CARBONNE DIT LEYCHERT GARENNE, Fredrik GRÖNBERG, Erik FREDENBERG
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Disclosed is a method and corresponding system for correcting the pileup effect in energy-discriminating photon-counting detectors. According to a first aspect, there is provided a method for pileup correction in a non-paralyzable energy-discriminating photon-counting x-ray detector operating based on a number of energy bins. The method includes adding, for each of a number of energy bins, a correction term to the detected signal of the energy bin, the correction term being a product of two separable parameterized functions, each of which includes at least one parameter, where a first parameterized function depends on a weighted sum of the detected signal over the energy bins, and where a second parameterized function depends on the detected signal(s) in one or several energy bin(s). By assuming separability and ignoring any cross correlations, the number of parameters and the complexity of the pileup correction algorithm are reduced substantially.
A method for pileup correction in a non-paralyzable energy-discriminating photon-counting x-ray detector operating based on a number of energy bins, wherein the method comprises adding, for each of a number of energy bins, a correction term to the detected signal of the energy bin, said correction term being a product of two separable parameterized functions, each of which includes at least one parameter, where a first parameterized function depends on a weighted sum of the detected signal over the energy bins, and where a second parameterized function depends on the detected signal(s) in one or several energy bin(s).
A system for pileup correction in a non-paralyzable energy-discriminating photon-counting x-ray detector operating based on a number of energy bins, wherein the system is configured to add, for each of a number of energy bins, a correction term to the detected signal of the energy bin, said term being a product of two separable parameterized functions, each of which includes at least one parameter, where a first parameterized function depends on a sum of the detected signal over the energy bins, and where a second parameterized function depends on the detected signal(s) in one or several energy bin(s).
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