Method for synchronously reconstructing dynamic PET image and tracer kinetic parameter on the basis of TV and sparse constraint
A technology with dynamic parameters and sparse constraints, applied in the field of PET imaging, can solve problems such as increasing noise and ignoring physiological information provided in time
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[0049] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0050] Such as Figure 5 As shown, the present invention is based on the total variational constraints and sparse constraints to simultaneously reconstruct the dynamic PET image and the method of tracking dynamic parameters, including the following steps:
[0051] S1. Organize the measurement data matrix y and the corresponding system matrix G according to the principle of dynamic PET detection;
[0052] S2. Establish a dictionary matrix Ψ: if it is simulated data, set the index parameter θ and the detector scanning time interval according to the half-life of the simulated tracer isotopic nuclide to establish a corresponding dictionary matrix; if it is real data, follow the example used in actual operation The corresponding dictionary matrix is establi...
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