Method and device for estimating random case, and computer readable storage medium

Abstract

The invention discloses a method and a device for estimating a random case, and a computer readable storage medium, belongs to the field of medical imaging. The method comprises the following steps: obtaining an axial position coordinate of the target layer of a scanned object and each response line of a detector at a target time, wherein the axial position coordinate is used to determine the axial position of a detector unit corresponding to the response line; obtaining a start time and a departure time of the target layer of the scanned object passing each response line; according to the start time, the departure time, and the axial position coordinate, determining a count rate of the detector unit corresponding to the response line in a counting period; estimating the number of random cases of the target layer of the scanned object basing on the count rate. According to the method and device for estimating the random case, and the computer readable storage medium, each detector unitcount and the different axial positions of the scanned object are corresponded according to the change of the relative positions of the scanned object and the detector with time so as to accurately estimate the random case corresponding to the different axial positions of the scanned object.

Description

technical field [0001] The present invention relates to the field of medical imaging, in particular to a random event estimation method, device and computer-readable storage medium. Background technique [0002] Positron Emission Tomography (English: Positron Emission Tomography; Abbreviation: PET) is a high-end nuclear medicine imaging diagnostic equipment. In actual operation, radioactive nuclides are used to label metabolites, and the labeled metabolites will emit positrons through decay, which annihilate with surrounding electrons to produce a pair of photons that are emitted in opposite directions. If two photons are detected by the detector crystal of the PET detection system at the same time, it is considered that the nuclide is on the line of a pair of detectors corresponding to the captured photon, which is called the line of response (LOR), and a line of response corresponds to a coincidence case. However, random events sometimes exist in coincidence events, that ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a random case estimation method, device and computer-readable storage medium, which can provide a random case estimation method for the continuous mobile scanning mode, and solve the problem that the estimation algorithm provided in the related art is not suitable for the continuous mobile scanning mode

Images