CT imaging system and CT imaging method

Abstract

The invention discloses a CT imaging system and a CT imaging method. The system includes: an X-ray source, a rotary table, an energy-resolving photon counting-type X-ray detector, and a processor, wherein the rotary table is configured to carry an imaging target, and carries the imaging target to rotate with a rotary table rotating shaft as a rotation center. The X-ray source is used for emittingX-rays to the imaging target; the energy-resolving photon counting-type X-ray detector is electrically connected to the processor for collecting the imaging targets passing through the X-rays, and theprojection data is sent to the processor in the projection data of the at least two energy intervals; the processor is configured to process the received projection data of the at least two energy intervals to generate the CT image of the imaging target. The technical scheme of the system achieves improving the contrast of the CT image and reducing the radiation risk.

Description

technical field [0001] Embodiments of the present invention relate to biomedical imaging technology, and in particular, to a CT imaging system and a CT imaging method. Background technique [0002] Medical CT can observe the conditions of various organs and tissues of the object in the living body. It performs images according to the different absorption and transmittance of X-rays by different tissues of the human body, and finds small lesions in the body. It is a widely used medical science. imaging device. [0003] In conventional X-ray CT imaging, the X-ray source produces multi-energy X-rays with a continuous energy spectrum, and the detector receives X-ray photons with different energies as a whole to reflect the average attenuation characteristics of X-rays. This not only causes the loss of X-ray attenuation information, but also is not conducive to distinguishing the tissue components of the imaging object, and the reconstructed CT image, especially the soft tissue ...

AI Technical Summary

Problems solved by technology

This not only causes the loss of X-ray attenuation information, but also is not conducive to distinguishing the tissue components of the imaging object, and the reconstructed CT image, especially the soft tissue contrast is not obvious, which affects the imaging quality

At the same time, in the live imaging of small animals, in order to improve the contrast of the imaging area, it is often necessary to perform two imaging operations before and after contrast, resulting in increased radiation risks and increased difficulty in image registration.

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