Adjustable Radiation Phase Contrast Imaging Device
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Solution Overview
Problem
Conventional radiation phase contrast imaging devices using Talbot interference have limited flexibility in imaging due to fixed parameters such as slit intervals, grating distances, and detector configurations, making it difficult to adjust for various imaging purposes and resulting in a narrow range of applicable enlargement ratios.
Innovation Solution
A radiation phase contrast imaging device with a multi-slit and grating configuration that allows for adjustable slit and grating pitch changes, enabling flexible positioning and configuration to accommodate different imaging needs by changing the arrangement pitches of the slits and grating structures, thereby adjusting the enlargement ratio of the self-image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the parameters (slit interval, grating distance, detector configuration) are fixed to capture the self-image, then the device can achieve clear imaging at specific enlargement ratios, but the device lacks flexibility and cannot accommodate various imaging purposes with different magnification requirements
Solution Approach 1:
The patent applies the dynamics principle by making the grating structure adjustable. Specifically, the grating can be moved along the optical axis to change the distance between the grating and the detector, and the grating pitch can be adjusted. This dynamic adjustment capability allows the system to adapt to different imaging requirements while maintaining the ability to capture clear self-images at various enlargement ratios.
Solution Approach 2:
The patent implements parameter changes by allowing adjustment of key parameters including the grating-detector distance, grating pitch, and slit interval. These parameter changes enable the system to optimize the enlargement ratio for different imaging purposes. The detector pitch remains fixed, but the other parameters can be varied to achieve the desired imaging conditions.
2Adaptability or versatility
If the detector pitch is fixed, then the device structure is simplified, but the enlargement ratio range is limited and cannot be adjusted for different imaging needs
Solution Approach 1:
Instead of making the detector pitch adjustable (which would increase complexity), the patent applies dynamics by making the grating position and pitch adjustable. This allows the enlargement ratio to be changed while keeping the detector configuration fixed, thereby achieving adaptability without increasing device complexity.
Solution Approach 2:
The patent changes parameters on the grating side (grating-detector distance and grating pitch) rather than changing the detector pitch. This approach achieves enlargement ratio adjustment while maintaining a fixed, simpler detector configuration. The relationship between these parameters and the enlargement ratio is governed by the Talbot effect physics.
3Manufacturing precision
If the slit interval and grating pitch are optimized for a specific enlargement ratio, then clear self-image capture is achieved, but the device cannot accommodate imaging purposes requiring different magnifications
Solution Approach 1:
The patent makes the grating pitch and grating-detector distance dynamic and adjustable. This allows the system to optimize the self-image clarity for different enlargement ratios by adjusting these parameters accordingly. The multi-slit configuration also remains adjustable to maintain optimal conditions across different imaging scenarios.
Solution Approach 2:
The patent designs the system with universal adjustability, where a single device configuration can serve multiple imaging purposes by adjusting the grating position, grating pitch, and slit interval. This multi-functionality allows the same device to capture clear self-images at various enlargement ratios without requiring multiple specialized configurations.
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 configuration allows for a wider range of imaging purposes by enabling the device to change the enlargement ratio of the self-image, ensuring clear imaging across various magnifications without the need to alter the detector pitch, thus enhancing the device's flexibility and imaging capabilities.
Implementation Method 1
A radiation phase contrast imaging device that images an internal structure of an object by using a phase contrast of a radiation that is transmitted through the object... Such a device images an internal structure of an object by using Talbot interference
Implementation Method 2
When a radiation is emitted to the phase grating 55, a self-image of the phase grating 55 appears at a position distant from the phase grating 55 by a specified distance (Talbot distance)... This self-image is an image that looks like a shadow of the phase grating 55 reflected. However, it is to be noted that the self-image is an interference fringe generated by radiation interference
Implementation Method 3
a detector configured to detect a self-image of the grating or a shadow produced through absorption by the grating, the detector including detection elements arranged longitudinally and latitudinally, the detection elements detecting the radiation
Data Source
Figure 1
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AI summary
An X-ray phase contrast imaging device of the present invention can change an arrangement pitch of slits related to a multi-slit 3b and an arrangement pitch of phase shift sections 5a related to a phase grating 5. A positional relationship among the multi-slit 3b, the phase grating 5, and an FPD 4 is determined based on the arrangement pitch of the slits related to the multi-slit 3b, the arrangement pitch of the phase shift sections 5a related to the phase grating 5, and an arrangement pitch of detection elements related to the FPD 4. Among these arrangement pitches, by changing the arrangement pitch of the slits and the arrangement pitch of the phase shift sections 5a, the present invention can change the positional relationship among the multi-slit 3b, the phase grating 5, and the FPD 4.