Offset focus correction coefficient determination method and CT image generation method and device

Abstract

The invention relates to an offset focus correction coefficient determination method and a CT image generation method and device. The offset focus correction coefficient determination method comprises the following steps: acquiring training data; the training data comprises water simulation data acquired based on first CT equipment; constructing a loss function based on the offset-focus water model image; the offset-focus water model image is a water model image with offset-focus artifacts; taking the water model generation data as input of a pre-training image generation model to obtain an output water model image based on the pre-training image generation model; calculating a loss value of the output water model image based on the loss function, training the pre-trained image generation model until the loss value reaches a convergence threshold, and obtaining a completely trained image generation model; and determining an offset focus correction coefficient of the first CT equipment according to model parameters of the image generation model obtained by training. According to the invention, automatic determination of the offset focus correction coefficient is realized, and manpower and time costs are reduced.

Description

Technical field [0001] The present application relates to the field of image reconstruction, and in particular, a method of determining a deflection correction coefficient, a CT image generation method, and a device. Background technique [0002] In the CT device, the transmission of X-rays is affected by various factors, such as the scattering of the object, the scattering of the tube target, and the error of the detector mounting process. These factors can result in image generation of imaging artifacts that affect clinicia diagnosis. [0003] In the prior art, it is generally adjusted to adjust the dial correction coefficients of the CT detector to different modules to reduce the reconstructed image in the reconstructed image. However, this method consumes time consuming, it is not conducive to the product's mass production and productive. Inventive content [0004] The present application provides a method of determining a polarization correction coefficient, a CT image gene...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a defocus correction coefficient determination method, CT image generation method and device, to at least solve the time-consuming and labor-intensive process of manually iteratively adjusting the defocus correction coefficient of CT equipment in the related art

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