X ray tomography method and system

Abstract

The invention belongs to the technical field of X ray imaging and provides an X ray tomography method and system. The method comprises the steps that a controller starts X ray sources in a multi-focal-spot X light source array one by one according to a preset scanning mode to carry out pulse emission in scanning, and controls a current X ray source to irradiate a scanned object according to a preset pulse exposure time such that the surface doses on the scanned object cast by the X ray sources on different arrangement positions converge; a detector collects projection images after the X ray sources on the different arrangement positions irradiate the scanned object and transmits the projection images to terminal equipment; and the terminal equipment reconstruct the three-dimensional image of the scanned object according to the projection images. According to the method and the system, the quality of the projection images is adjusted through controlling a pulse exposure time, compared with a mode of adjusting tube current, the hardware cost is low, the adjustment precision is high, and the overall radiation dose of a scanning process can be effectively reduced under the premise of ensuring imaging quality.

Description

technical field [0001] The invention belongs to the technical field of X-ray imaging, and in particular relates to an X-ray tomographic scanning method and system. Background technique [0002] With the application of cold cathodes on X-ray sources, static multi-angle scanning imaging can be realized by using multiple cold cathodes integrated multi-focus spot X-ray source arrays. Since the multi-focal spot X-ray source array needs to arrange dozens of X-ray sources on a limited geometric structure, the existing easy-to-implement array form is a linear structure. When the multi-focal-spot X-ray source array adopts a linear array parallel to the detector plane, the angles at which the X-ray sources at different arrangement positions illuminate the scanning object are different from each other, and the X-ray source arranged in the central area is far from the scanning object. Closer, the X-ray sources arranged at both ends are farther away from the scanned object, and the dist...

AI Technical Summary

Problems solved by technology

This solution is simpler than adjusting the tube current, but in order to ensure the quality of the reconstructed image, the radiation dose of the X-ray sources arranged at both ends to the scanning object needs to be the minimum standard, which will increase the X-rays arranged in the middle. The radiation intensity of the source to the scanned object, so the overall radiation dose is increased under the premise of ensuring image quality

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