X-ray equipment and scattering correction method applied to X-ray equipment

Abstract

The invention provides an X-ray device and a scatter correction method applied to the X-ray device, and the scatter correction method comprises the steps: detecting the first ray intensity of an X-ray located in a main ray irradiation region, and detecting the second ray intensity of an X-ray located in a non-main ray irradiation region, the non-main ray irradiation area is positioned on the outer side of the main ray irradiation area; the calculation relation between the first ray intensity and the second ray intensity is established, and the correction of the scattered rays of the main ray irradiation area is calculated according to the calculation relation, so that the influence of the scattered rays on the main rays can be effectively weakened, the dependence of the scattered rays on an anti-scattering grating is reduced, and the anti-scattering effect of the main rays is improved. Compared with the prior art, a detector is not additionally arranged in a large range to enlarge the distribution range of the detector, the cost of the detector is not obviously increased, and the dependence of the scattering correction method on hardware correction is reduced, so that the scattering correction difficulty is reduced.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to an X-ray device and a scattering correction method applied to the X-ray device. Background technique [0002] As a medical device with high image resolution, fast imaging speed, powerful post-processing function and low radiation dose, X-ray equipment is widely used in the field of medical diagnosis and treatment. The X-ray equipment includes an X-ray source and a detector arranged oppositely, and an object to be scanned is arranged between the X-ray source and the detector. When the X-ray source irradiates the scanning object, two physical processes occur, namely the photoelectric effect and the Compton effect. Taking the CT system as an example, during image reconstruction, the scattered photons generated by the Compton effect will greatly interfere with image reconstruction, and the ratio of the intensity of the scattered rays to the intensity of the main rays will also vary...

AI Technical Summary

Problems solved by technology

However, since the ASG is on the optical path between the X-ray source and the ray-receiving end of the detector, the main ray is easy to introduce additional error information. Among them, the ASG deviates from the ideal state due to factors such as the design of the ASG itself, processing errors, or the environment, resulting in Problem with poor image quality

In addition, because ASG itself is difficult to process, it requires a lot of production technology and precision, resulting in high cost, which increases the overall cost of the CT system

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