Attenuation correction method and device for image in PET system
AssigneeNeusoft Positron Medical Systems Co., Ltd. Shenyang
InventorZhipeng Sun
Life of this patent
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Abstract
An attenuation correction method and device for an image in a PET system. The method includes: acquiring transmission scanning sinogram data from a PET apparatus; reconstructing the transmission scanning sinogram data with Bayesian model-based Ordered Subset Expectation Maximization (OSEM-B) algorithm and Filtered Back Projection (FBP) algorithm, to obtain an OSEM-B attenuation image and a first FBP attenuation image respectively; performing a weighted calculation on the OSEM-B attenuation image and the first FBP attenuation image to obtain an effective attenuation image; and performing attenuation correction on emission scanning sinogram data from the PET apparatus by using an attenuation sinogram generated based on the effective attenuation image.
Claims10
An attenuation correction method for an image in a Positron Emission computed Tomography (PET) system, comprising:
- acquiring transmission scanning sinogram data from a PET apparatus;
- reconstructing the transmission scanning sinogram data with Bayesian model-based Ordered Subset Expectation Maximization (OSEM-B) algorithm and Filtered Back Projection (FBP) algorithm, to obtain an OSEM-B attenuation image and a first FBP attenuation image respectively;
- performing a weighted calculation on the OSEM-B attenuation image and the first FBP attenuation image to obtain an effective attenuation image;
- and
- performing attenuation correction on emission scanning sinogram data from the PET apparatus by using an attenuation sinogram generated based on the effective attenuation image.
An attenuation correction device for an image in a Positron Emission computed Tomography (PET) system, comprising:
- an original data acquiring module, configured to acquire transmission scanning sinogram data from a PET apparatus;
- a Bayesian model-based Ordered Subset Expectation Maximization (OSEM-B) reconstruction module, configured to reconstruct the transmission scanning sinogram data with OSEM-B algorithm, to obtain an OSEM-B attenuation image;
- a Filtered Back Projection (FBP) reconstruction module, configured to reconstruct the transmission scanning sinogram data FBP algorithm, to obtain a first FBP attenuation image;
- a weighted calculation module, configured to perform a weighted calculation on the OSEM-B attenuation image and the first FBP attenuation image to obtain an effective attenuation image;
- and
- an attenuation correction module, configured to perform attenuation correction on emission scanning sinogram data from the PET apparatus by using an attenuation sinogram generated based on the effective attenuation image.
Dependencies are inferred from the claim text.