Dead time correction method and device, computer equipment and storage medium

Abstract

The invention relates to a dead time correction method and device, computer equipment and a storage medium, and relates to the technical field of computers. The method comprises the following steps: acquiring first PET data of a first scanning object, determining a first coincidence event counting rate of a PET detector according to the first PET data, and determining a peak-to-valley ratio of a first energy spectrum, wherein the first coincidence event counting rate is the counting rate of an event which is generated after coincidence judgment is carried out on [gamma] photons emitted by drugs in a first scanning object captured by a PET detector and used for reconstructing a PET image, and the first energy spectrum is the energy spectrum of the [gamma] photons emitted by the drugs in the first scanning object captured by the PET detector; determining a first dead time factor according to the peak-to-valley ratio of the first energy spectrum and a pre-fitted target function; and correcting the first PET data according to the first dead time factor to obtain target PET data for reconstructing the PET image. By adopting the method, the dead time correction efficiency of the scanned object can be improved.

Description

technical field [0001] The present application relates to the field of computer technology, in particular to an artifact identification method, device, computer equipment and storage medium. Background technique [0002] Positron Emission Computed Tomography (English: Positron Emission Computed Tomography; abbreviation: PET) is an advanced nuclear medical imaging technology, which introduces drugs labeled with radionuclides into a phantom, where the phantom can be a mouse other organisms. After the radionuclide-labeled drug is redistributed in the phantom, the PET detector captures the gamma photons generated by the annihilation of electrons and positrons, and after measurement and image reconstruction, the distribution and dynamic change images of the radionuclide-labeled drug in the phantom are obtained. A PET image is thus generated. However, since the PET detector can no longer capture other gamma photons during the process of capturing a gamma photon and making a coin...

AI Technical Summary

Problems solved by technology

[0004] Since the empirical model established in the above method is seriously affected by the phantom itself and the external environment, the empirical model established in the above method cannot be applied to other phantoms

As a result, multiple empirical models need to be established when performing dead time correction on different phantoms, the process is complicated and inefficient

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