Image reconstruction method for multi-modal imaging system

Abstract

The invention relates to the technical field of multi-modal imaging, and discloses an image reconstruction method for a multi-modal imaging system. The method includes the following steps: S1, acquiring and storing first modal scanning data of a scanning object; S2, acquiring and storing second modal scanning data of the scanning object; S3, reconstructing the first modal scanning data acquired in S1 to obtain a first modal image of the scanning object; S4, performing calculation and scanning according to the first modal image reconstructed in S3 to obtain an evenness index of the first modal image of the scanning object; S5, planning a second modal scanning area of the scanning object according to the evenness index obtained in S4; and S6, obtaining second modal scanning data of the scanning area according to the obtained second modal scanning area. The method may process CT scanning data, perform PET scanning by selecting partial area of the scanning object and perform image reconstruction, and therefore, the problem of long PET image reconstruction time in a multi-modal imaging system can be solved.

Description

technical field [0001] The invention relates to the technical field of multimodal imaging, in particular to an image reconstruction method for a multimodal imaging system. Background technique [0002] In a multimodal imaging system, two or more different sensing modalities are used to localize and measure different components in object space. In the PET-CT system, CT refers to a computerized tomography system, and PET refers to a positron emission tomography system. Whereas CT scans allow doctors to see the body's internal anatomy, PET creates images of the body's high metabolic activity rather than surrounding anatomy. Patients receive radiopharmaceutical doses prior to PET-CT scans. Drugs are carried through the blood and concentrated into a specific organ or area, causing radiation to be emitted from the blood and the organ or area. During the scan, the trajectory of the emitted radiation is detected by the system, thereby creating an image of the distribution of the ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an image reconstruction method for a multi-modal imaging system, which has the ability to process CT scan data and select a partial area of ​​the scanning object for PET scanning, which solves the problems in the multi-modal imaging system. The advantages of long PET image reconstruction time solve the problem that in the PET-CT imaging system, it is necessary to perform CT and PET large-scale scanning of the region of interest of the scanning object. In most cases, in order to better ensure attenuation correction The scanning area of ​​CT is larger than that of PET. Since PET scanning takes a long time to obtain scanning data and the amount of data is large, the reconstruction process will also cause the problem of high resource consumption and long time consumption.

[0007] In order to achieve the purpose of solving the problem of long PET image reconstruction time in a multimodal imaging system by processing CT scan data and selecting a partial area of ​​the scanned object for PET scanning, the present invention provides the following technical solutions: a multimodal A state imaging system image reconstruction method comprises the steps of:

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