X-ray Source Grating Stepping Imaging System
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Solution Overview
Problem
Existing X-ray imaging technologies, such as traditional X-ray scan imaging, phase-contrast imaging, and dark-field imaging, face challenges in achieving high precision and cost-effectiveness due to the need for high-precision mechanical devices and complex optical elements, particularly in hard X-ray imaging, which limits their application and extends the difficulty in constructing the imaging system.
Innovation Solution
An X-ray imaging system that uses a low-precision source grating for stepping movements while keeping a high-precision fixed grating module, allowing for the calculation of refraction, scattering, and attenuation information through light intensity curve comparisons, reducing the system's construction cost and increasing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional grating-based X-ray imaging technologies are used, then image quality and imaging effectiveness are improved, but the precision requirements for mechanical devices increase and system construction cost increases
Solution Approach 1:
The patent inverts the traditional grating configuration by making the source grating movable and the detector grating fixed. This inversion allows the high-precision requirements to be transferred from the mechanical stepping mechanism to the stationary detector configuration, thereby reducing the precision requirements for mechanical devices while maintaining image quality.
Solution Approach 2:
The patent uses a fixed grating module at the detector that replicates the function of the movable source grating. By having the detector grating remain stationary while the source grating moves, the system copies the necessary measurement function without requiring high-precision mechanical positioning of the detector side, thus reducing manufacturing precision requirements.
2Productivity
If high-precision mechanical devices are used for grating stepping, then imaging effectiveness is improved, but system construction cost increases
Solution Approach 1:
By inverting the traditional configuration and making the source grating movable rather than the detector grating, the patent reduces the need for expensive high-precision mechanical stepping devices. The movable source grating can be positioned with lower precision, thereby reducing system construction cost while maintaining imaging effectiveness.
Solution Approach 2:
The patent employs a movable source grating that can be implemented with lower precision and lower cost mechanisms compared to high-precision detector gratings. This allows the system to use more economical components for the stepping function, reducing overall system construction cost while preserving imaging quality.
3Productivity
If complex optical elements are used for hard X-ray imaging, then imaging effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent extracts the complex optical element requirements from the detector side by using a fixed grating module that simplifies the detection configuration. By removing the need for complex high-precision mechanical positioning at the detector, the system reduces device complexity while maintaining imaging effectiveness through the simplified fixed grating architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the same image quality and effectiveness as traditional grating-based imaging technologies while significantly reducing the precision requirements for mechanical devices, making the system more cost-effective and easier to apply in medical and material science fields.
Implementation Method 1
the appeared phase-contrast imaging methods usually enhance the low contrast resolution of the radiated image by using interference or diffraction phenomenon of coherent or partially coherent X-ray
Implementation Method 2
the appeared phase-contrast imaging methods usually enhance the low contrast resolution of the radiated image by using interference or diffraction phenomenon of coherent or partially coherent X-ray
Implementation Method 3
the detector receiving X-ray and converting it into an electrical signal
Implementation Method 4
in the technology based on a Talbot-Lau interference method, a phase grating or parse grating relatively moves several steps in parallel in one grating period
Data Source
AI summary
An X-ray imaging system comprising: an X-ray source, a source grating, a fixed grating module and an X-ray detector, which are successively positioned in the propagation direction of X-ray; an object to be detected is positioned between the source grating and the fixed gating module; said source grating can perform stepping movement in a direction perpendicular to the optical path and grating stripes; wherein the system further comprises a computer workstation for controlling said X-ray source, source grating and X-ray detector so as to perform the following processes: the source grating performs stepping movement in at least one period thereof; at each stepping step, the X-ray source emits X-ray to the object to be detected, and the detector receives the X-ray at the same time; wherein after at least one period of stepping and data acquisition, the light intensity of X-ray at each pixel point on the detector is represented as a light intensity curve; the light intensity curve at each pixel point on the detector is compared with a light intensity curve in the absence of the object to be detected, a pixel value of each pixel point is calculated from change in said light intensity curve; an image of the detected object is reconstructed according to the calculated pixel value.