PET concentration reestablishing method based on Kalman filtration in limited sampling angle
A technology of Kalman filtering and sampling angle, applied in echo tomography, computerized tomography scanner, etc., can solve problems such as untargeted solutions
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[0052] The positron emission tomography scanner detects the photon signals emitted in the human body, and after the coincidence judgment and acquisition system processing, the projection lines are formed and stored in the computer hard disk in the form of sinograms. The computer takes the sinogram as input, invokes the image reconstruction module, and calculates the image of drug radioactive concentration distribution in the human body.
[0053] The specific implementation steps of the inventive method are as follows:
[0054] 1. When using a PET positron emission tomography scanner, a transmission scan and an emission scan are performed. The attenuation correction factor for the image is obtained from the transmission scan.
[0055] In the simulation test, because it can be compared with the original image, only a range is selected for the limited sampling angle, that is, 30°<θ<150°. In the real experiment, due to the lack of comparison with the original image, in order to ...
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