Geometric correction method for x-ray imaging equipment, breast tomography equipment

Abstract

The invention relates to a geometric correction method of X-ray imaging equipment, an image reconstruction method and breast tomography equipment. The geometric correction method comprises the following steps: acquiring space position of a marker; generating a projection image of the marker, and acquiring a projection position of the marker in the projection image according to the projection image; and acquiring a geometric correction relation according to the space position of the marker and the projection position of the marker. According to the technical scheme, the geometric correction method is simple, the speed is high, the degree of accuracy of an acquired imaging geometric correction relation is high, after projection coordinates are transformed into space coordinates on the basis of the imaging geometric correction relation in a reconstruction process, the quality of a reconstructed image meets actual clinic requirements, and missed diagnosis and misdiagnosis can be avoided.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a geometric correction method of an X-ray imaging device, an image reconstruction method, and a breast tomographic imaging device. Background technique [0002] For medical imaging equipment, the accuracy of the spatial geometric relationship between the ray source and the detector plays a crucial role in the accuracy of the tomographic reconstruction results. However, the actual spatial position of the ray source and detector will always introduce errors due to installation accuracy, feedback accuracy, measurement accuracy, etc. In addition, as the service life of medical imaging equipment increases, the accuracy of the spatial position of the ray source and detector will also The above reasons may cause the final reconstructed image to have large noise, blurred edges or artifacts. If the reconstructed image is used for diagnosis, it is likely to lead to missed diagnosi...

AI Technical Summary

Problems solved by technology

However, the actual spatial position of the ray source and the detector will always introduce errors due to installation accuracy, feedback accuracy, and measurement accuracy. In addition, as the service life of medical imaging equipment increases, the accuracy of the spatial position of the ray source and detector will also decrease. The above reasons may cause the final reconstructed image to be noisy, blurred or have artifacts. If the reconstructed image is used for diagnosis, it may lead to missed diagnosis or misdiagnosis

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