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US 11,324,472 B2Granted
Energy-based scatter correction for PET sinograms
AssigneeSiemens Medical Solutions USA, Inc.
InventorJames Hamill
Life of this patent
Estimating the term…
Abstract
A method of estimating energy-based scatter content in PET list-mode data is provided.
Claims25
A method of estimating scattered radiation in a positron emission tomography (PET) scanner that records the energy of each detected photon, in the case when both scattered and non-scattered radiation is present, the method comprising:
- (a) acquiring scatter-free PET scan data using a substantially scatter-free source phantom in air, wherein the PET scan data comprises PET list-mode data;
- (b) quantifying energy signals of the non-scattered radiation based on the acquired scatter-free PET scan data;
- (c) modeling the scattered radiation based on the spectrum of non-scattered radiation with a reduction of the energy signal and a modification to the spectrum's shape;
- (d) acquiring scan data representative of a targeted patient tissue region using a PET scanner, wherein the scan data comprises PET list-mode data;
- (e) quantifying the distribution of energy signals in the PET list-mode data as 2D histograms representing A crystal energy vs. B crystal energy;
- (f) automatically estimating the scatter content in the acquired PET list-mode data through an analysis of the energy signals in the PET list-mode data and the modeled scattered radiation, in which the scattered and non-scattered radiation are represented by a combination of at least three basis functions;
- and (g) applying the estimated scatter content in the image reconstruction of the PET list-mode data, to obtain scatter-corrected image.
4 more elements
A method for processing positron emission tomography (PET) scan data, comprising:
- (a) acquiring scan data representative of a targeted patient tissue region using a PET scanner, wherein the scan data comprises PET list-mode data;
- (b) quantifying the distribution of energy signals in the PET list-mode data as 2D histograms representing A crystal energy vs. B crystal energy;
- (c) automatically estimating the scatter content in the acquired PET list-mode data through an analysis of the energy signals in the PET list-mode data and modeled scattered radiation acquired from a calibration of the PET scanner, in which the scattered and non-scattered radiation are represented by a combination of at least three basis functions;
- and (d) applying the estimated scatter content in the image reconstruction of the PET list-mode data, to obtain scatter-corrected image.
1 more element
A positron emission tomography (PET) scanner system comprising:
- a processor configured to:
- (a) acquire scan data representative of a targeted patient tissue region using a PET scanner, wherein the scan data comprises PET list-mode data;
- (b) quantify the distribution of energy signals in the PET list-mode data as 2D histograms representing A crystal energy vs. B crystal energy;
- (c) automatically estimate the scatter content in the acquired PET list-mode data through an analysis of the energy signals in the PET list-mode data and modeled scattered radiation acquired from a calibration of the PET scanner, in which the scattered and non-scattered radiation are represented by a combination of at least three basis functions;
- and (d) apply the estimated scatter content in the image reconstruction of the PET list-mode data, to obtain scatter-corrected image.
2 more elements
A non-transitory computer-readable storage medium storing instructions configured to cause a computer system to execute the steps of:
- (a) acquiring scan data representative of a targeted patient tissue region using a PET scanner, wherein the scan data comprises PET list-mode data;
- (b) quantifying the distribution of energy signals in the PET list-mode data as 2D histograms representing A crystal energy vs. B crystal energy;
- (c) automatically estimating the scatter content in the acquired PET list-mode data through an analysis of the energy signals in the PET list-mode data and modeled scattered radiation acquired from a calibration of the PET scanner, in which the scattered and non-scattered radiation are represented by a combination of at least three basis functions;
- and (d) applying the estimated scatter content in the image reconstruction of the PET list-mode data, to obtain scatter-corrected image.
1 more element
Dependencies are inferred from the claim text.