Image reconstructing method, device and equipment

Abstract

The application provides an image reconstructing method, an image reconstructing device and image reconstructing equipment. The method comprises the following steps: determining a crystal efficiency factor and a geometrical factor of a single crystal in a crystal pair, wherein the crystal pair is the one on a crystal ring in PET equipment; determining the sensitivity of the crystal pair according to the crystal efficiency factor and the geometrical factor of the single crystal in the crystal pair; acquiring data of a patent scanned by the crystal pair; correcting the data by means of the sensitivity of the crystal pair; and reconstructing an image according to the corrected data. According to the application, by determining the sensitivity of the crystal pair according to the crystal efficiency factor and the geometrical factor of the single crystal in the crystal pair and effectively correcting the scanned data by means of the sensitivity, the image reconstructing accuracy is improved. In addition, by correcting the background radiation of the crystals, a radioactive source needs not to be purchased and a radioactive source device needs not to be manufactured, so that the geometrical factor of the crystal pair is concisely and efficiently calculated, and therefore, the cost is lowered, and the radioactive danger of an operator is avoided.

Description

technical field [0001] The present application relates to the technical field of medical equipment, in particular to an image reconstruction method, device and equipment. Background technique [0002] Positron emission tomography (PET, positron emission tomography) equipment is currently recognized as one of the most advanced large-scale medical research and clinical diagnostic equipment, and has excellent performance in diagnosing tumors, cardiovascular diseases and other diseases. In the process of collecting patient data by PET equipment, due to the inconsistent sensitivity (efficiency) of the crystal pair due to the polygonal geometry of the PET equipment, there is a difference between the number of collected data and the actual number of data emitted by the patient, and the reconstructed image cannot Correctly reflect the distribution of radioactive elements in the patient's body. [0003] In order to solve this problem, it is proposed in the prior art to perform geome...

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Problems solved by technology

[0004] In the prior art, although the geometric factor of the crystal pair can be corrected to ensure the consistency of the sensitivity of the crystal pair to improve the accuracy of image reconstruction, however, in the existing method, on the one hand, it is necessary to place the emission source device, and The design of the external radioactive source device is complex, and the radioactive source is not easy to store and shield, and is expensive; on the other hand, the calibration process requires the staff to manipulate the radioactive source device, and the radiation emitted by the radioactive source will cause radiation hazards to the staff's body

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