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Phase contrast imaging method and device, storage medium and electronic equipment

A phase-contrast imaging and phase-contrast technology, applied in measuring devices, material analysis using wave/particle radiation, instruments, etc., can solve the problems of poor precision, difficult to etch gratings, difficulty in manufacturing and high cost, and reduce processing costs Reliance, the effect of reducing imaging costs

Pending Publication Date: 2021-03-30
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, in order to achieve high-energy phase contrast imaging, it is necessary to rely on high-aspect-ratio grating processing technology to manufacture gratings with ultra-high aspect ratios. However, it is difficult to etch gratings with ultra-high aspect ratios in current grating manufacturing technology.
Even if a grating with an ultra-high aspect ratio can be obtained through some extremely harsh means, the difficulty and cost of its production are extremely high, resulting in high cost and poor accuracy of high-energy phase contrast CT images

Method used

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  • Phase contrast imaging method and device, storage medium and electronic equipment
  • Phase contrast imaging method and device, storage medium and electronic equipment
  • Phase contrast imaging method and device, storage medium and electronic equipment

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Embodiment 1

[0029] figure 1 It is a schematic flow chart of a phase contrast imaging method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of rapidly generating high-energy phase contrast images. This method can be executed by the phase contrast imaging device provided by the embodiment of the present invention. Specifically Including the following steps:

[0030] S110. Collect first spectral CT projection data and second spectral CT projection data, wherein photon energy in the first spectral CT projection data is smaller than photon energy in the second spectral CT projection data;

[0031] In this embodiment, the imaging target is carried by the supporting platform, the X-ray source emits X-rays to the imaging target, and the X-ray detector collects the projection data of the X-ray passing through the imaging target, wherein the imaging target may be a human body or an animal body.

[0032] Optionally, the projection data of two energ...

Embodiment 2

[0050] image 3 It is a schematic flow chart of a phase contrast imaging method provided in Embodiment 2 of the present invention. On the basis of the above embodiment, an electronic imaging method is generated based on the first energy spectrum CT projection data and the second energy spectrum CT projection data. Density distribution CT images were refined. Specific methods include:

[0051] S210. Collect the first energy spectrum CT projection data and the second energy spectrum CT projection data. Wherein, the photon energy in the first energy spectrum CT projection data is smaller than the photon energy in the second energy spectrum CT projection data.

[0052] S220. Input the first spectral CT projection data and the second spectral CT projection data into a pre-trained spectral decomposition model, and determine the electron density distribution CT according to the output result of the spectral decomposition model An image, wherein the energy spectrum decomposition mo...

Embodiment 3

[0077] Figure 5 It is a schematic structural diagram of a phase-contrast imaging device provided in Embodiment 3 of the present invention, and the phase-contrast imaging device includes:

[0078] A data collection module 310, configured to collect first energy spectrum CT projection data and second energy spectrum CT projection data, wherein the photon energy in the first energy spectrum CT projection data is less than that of the second energy spectrum CT projection data photon energy;

[0079] An electron density distribution CT image generation module 320, configured to generate an electron density distribution CT image based on the first energy spectrum CT projection data and the second energy spectrum CT projection data;

[0080] The phase-contrast CT image generation module 330 is configured to generate a phase-contrast CT image according to the electron density distribution CT image based on preset rules.

[0081] On the basis of the foregoing embodiments, the data c...

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Abstract

The embodiment of the invention discloses a phase contrast imaging method and device, a storage medium and electronic equipment. The method comprises the steps: collecting first energy spectrum CT projection data and second energy spectrum CT projection data, wherein photon energy in the first energy spectrum CT projection data is smaller than photon energy in the second energy spectrum CT projection data; generating an electron density distribution CT image based on the first energy spectrum CT projection data and the second energy spectrum CT projection data; and based on a preset rule, generating a phase contrast CT image according to the electron density distribution CT image. Based on the above technical scheme, high-energy phase contrast CT imaging is realized, dependence on high aspect ratio grating processing is reduced, a high-energy phase contrast CT image is rapidly generated based on a mature energy spectrum CT imaging technology, and imaging cost is reduced.

Description

technical field [0001] Embodiments of the present invention relate to phase contrast imaging technology, and in particular to a phase contrast imaging method, device, storage medium, and electronic equipment. Background technique [0002] X-ray grating phase contrast imaging technology is an imaging method based on X-ray diffraction effect. The X-ray wave after passing through the grating encodes the refraction information of the object in the diffraction fringe. By detecting the relative shift of the diffraction fringe, the absorption signal, refraction signal and scattering signal of the object can be obtained respectively. [0003] At present, it is difficult to realize grating X-ray phase contrast imaging in the higher energy range. This is mainly because theoretically the higher the X-ray energy is, the larger the aspect ratio of the corresponding grating is. Therefore, in order to realize high-energy phase contrast imaging, it is necessary to rely on high-aspect-rati...

Claims

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Application Information

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IPC IPC(8): G01N23/046
CPCG01N23/046
Inventor 葛永帅梁栋陈剑威刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI