Time of flight scatter distribution estimation in positron emission tomography
AssigneeSiemens Medical Solutions USA, Inc.
InventorVladimir Y. Panin
Life of this patent
Estimating the term…
Abstract
Estimating time-of-flight (TOF) scatter distribution in a positron emission tomography (PET) system. Obtaining PET TOF projection data: PET random coincidence data and PET TOF prompt coincidence events data. Reducing measured TOF projection data to non-TOF projection data. Reconstructing, unbiased, the non-TOF projection date. Forward projecting unbiased reconstructed non-TOF projection data to estimate TOF trues distribution. Subtracting: The estimated TOF trues distribution and the measured random coincidence, from measured TOF prompt coincidence events.
Claims18
A computer-implemented method for estimating time-of-flight (TOF) scatter distribution in a positron emission tomography (PET) system, the method comprising:
- obtaining PET TOF projection data:
- PET random coincidence data and PET TOF prompt coincidence events data;
- reducing measured TOF projection data to non-TOF projection data;
- reconstructing, unbiased, the non-TOF projection data;
- forward projecting unbiased reconstructed non-TOF projection data to estimate TOF trues distribution;
- and
- subtracting:
- the estimated TOF trues distribution and the measured random coincidence, from measured TOF prompt coincidence events.
A computer program product for estimating time-of-flight (TOF) scatter distribution in a positron emission tomography (PET) system, the computer program product comprising:
- a least one computer readable medium;
- and
- at least one program module,
- stored on the at least one medium, and
- operative, upon execution by at least one processor for:
- obtaining PET TOF projection data:
- PET random coincidence data and PET TOF prompt coincidence events data;
- reducing measured TOF projection data to non-TOF projection data;
- reconstructing, unbiased, the non-TOF projection data;
- forward projecting unbiased reconstructed non-TOF projection data to estimate TOF trues distribution;
- and
- subtracting:
- the estimated TOF trues distribution and the measured random coincidence, from
- measured TOF prompt coincidence events.
A system for estimating time-of-flight (TOF) scatter distribution in a positron emission tomography (PET) system, the system comprising:
- at least one processor,
- at least one computer readable medium in communication with the processor;
- at least one program module,
- stored on the at least one medium, and operative upon execution by the processor for:
- obtaining PET TOF projection data:
- PET random coincidence data and PET TOF prompt coincidence events data;
- reducing measured TOF projection data to non-TOF projection data;
- reconstructing, unbiased, the non-TOF projection data;
- forward projecting unbiased reconstructed non-TOF projection data to estimate TOF trues distribution;
- and
- subtracting:
- the estimated TOF trues distribution and the measured random coincidence, from
- measured TOF prompt coincidence events.
Dependencies are inferred from the claim text.