CT imaging system and method for medical test of human body

Abstract

The invention discloses a CT (Computed Tomography) imaging system and a method for medical test of a human body. The system comprises an illuminant device, a fan beam generating device with a slit, a beam splitting grating, a sample stage, an analysis grating, a detector, and a rotating device, wherein the sample stage is used for bearing the human body; the analysis grating is used for generating background light intensities required by generating an image, and enhancing or inhibiting a refraction signal or a scattered signal of a sample; the detector is used for detecting the variation of different background light intensities, and collecting projection data of the sample under the different background light intensities; and the rotating device is used for bearing and rotating the illuminant device, the fan beam generating device with the slit, the beam splitting grating, the beam splitting grating, the analysis grating and the detector. With the adoption of the grating shearing CT imaging system and the method, the image can be collected quickly; the density resolution and the density inhomogeneity resolution are high; an application requirement of the medical test of the human body is met; and the sample can be located either before the beam splitting grating, or behind the beam splitting grating, and is subjected to a lower radiation dose.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to a CT imaging system and method for human medical detection. Background technique [0002] Roentgen discovered X-rays in 1895 and was awarded the first Nobel Prize in Physics on December 10, 1901. The widely circulated X-ray photos of Mrs. Roentgen's hand reveal that X-rays have strong penetrating power, indicating that X-rays can be directly imaged to see the internal structure of the sample. This imaging mechanism based on the difference in X-ray absorption by substances was widely used in human medical imaging in the 1950s, and began to be used in three-dimensional imaging of the human body in the 1980s. Although this imaging technology based on the X-ray absorption mechanism can obtain images with sufficiently high contrast (that is, contrast) when observing objects composed of heavy elements, it can only obtain blurred images when observing objects composed of light ...

AI Technical Summary

Problems solved by technology

[0004] At present, the use of raster scanning to extract phase information and scattering information is the mainstream of international development. However, the raster scanning method does not meet the simple and fast requirements of medical imaging.

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