X-ray phase imaging incoherent scattering eliminator based on energy identification

A technology of incoherent scattering and X-rays, which is applied in the fields of radiodiagnostic instruments, material analysis using radiation, medical science, etc., can solve problems such as expanding the influence of scattering, and achieve universal applicability, small size, easy processing and The effect of purchase

Inactive Publication Date: 2009-08-12
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Because in the X-ray imaging device using the X-ray direct diffraction phase imaging method, the detector is not close to the back of the object to be measured as in the traditional absorption-based imaging device, but is pulled back farther, which further Increased the effect of scattering

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  • X-ray phase imaging incoherent scattering eliminator based on energy identification
  • X-ray phase imaging incoherent scattering eliminator based on energy identification

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Embodiment Construction

[0028] The present invention is an X-ray phase imaging incoherent scattering elimination device based on energy identification, comprising: an X-ray generating device 2 located in a radiation-proof housing 1, an X-ray source modulator 3 and an X-ray device located on the radiation-proof housing 1 Exit window 4 , object fixing device 5 , rear-end X-ray modulator 6 and X-ray detector 7 . Functionally, it can be divided into three parts. The first part is an X-ray generating and modulating system composed of an X-ray generating device 2 located in the radiation-proof housing 1 , an X-ray source modulator 3 and an X-ray exit window 4 located on the radiation-proof housing 1 . This part is used to provide near-monochromatic X-rays of the wavelengths required for imaging. The second part is a back-end X-ray modulation and detection system composed of a back-end X-ray modulator 6 and an X-ray detector 7 . This part is used to eliminate the influence of incoherent scattering in the ...

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Abstract

An energy-recognition-based X-ray phase imaging incoherent scattering elimination device includes three parts: an X-ray generation and modulation system, a device to be tested, and a back-end X-ray modulation and detection system. By selecting different filter materials, the invention can ensure that there is basically no loss of effective X-rays, and almost all primary radiation with a constant wavelength can reach the X-ray detector, thereby eliminating the influence of incoherent scattering on imaging quality. The invention can filter out the long-wavelength X-rays that are more harmful to the human body, so that the damage to the human body or biological tissues in the imaging process can be minimized, and has the characteristics of universal application, simple manufacture, low cost, small volume and good stability.

Description

technical field [0001] The invention relates to X-ray phase imaging, which is an X-ray phase imaging incoherent scattering elimination device based on energy identification, which can significantly improve the image quality obtained in X-ray phase imaging. The present invention can be applied to, but not limited to, a breast X-ray phase imaging device for detecting tiny calcifications in the breast. Background technique [0002] When a beam of X-rays passes through matter in a certain direction, its intensity will generally be attenuated in three ways from a microscopic point of view: absorption of X-ray photons, coherent or incoherent scattering of X-rays, and generation of electron pairs. The generation of electron pairs requires that the energy of X-ray photons must reach 1.022 MeV, which has little effect on the imaging device of the conventional X-ray generation method. For X-rays with longer wavelengths and objects with larger atomic numbers, the scattering effect is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B42/02G01N23/04A61B6/00
Inventor 喻虹韩申生张帅彭卫军
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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