Anti-scatter Grid with Variable Wall Parameters
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Solution Overview
Problem
Radiation imaging systems face challenges in effectively suppressing scatter radiation, which degrades image quality by reducing the contrast-to-noise ratio, and existing solutions are either inefficient or costly.
Innovation Solution
An anti-scatter grid with a plurality of grid walls is integrated into the radiation imaging system, providing a uniform scatter-to-primary ratio by strategically configuring the thickness, height, and position of the grid walls to absorb scatter radiation while allowing primary radiation to pass through.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional anti-scatter grids are used, then scatter radiation suppression is achieved, but image quality degradation occurs due to non-uniform scatter-to-primary ratio
Solution Approach 1:
The patent applies local quality by making the grid wall parameters (thickness, height, shape) non-uniform across the detector array. Each grid wall is configured with specific local parameters to achieve a uniform scatter-to-primary ratio across the entire detector, allowing different regions to have different grid wall characteristics optimized for their specific scatter and primary radiation conditions
Solution Approach 2:
The patent changes the parameters of grid walls (thickness, height, shape, position) to optimize the scatter-to-primary ratio. By adjusting these physical parameters, the system achieves uniform suppression of scatter radiation while maintaining primary radiation intensity, thereby improving image quality
2Object-affected harmful factors
If grid walls with larger thickness and height are used, then scatter radiation absorption increases, but primary radiation intensity is reduced
Solution Approach 1:
The patent optimizes the parameters (thickness, height, shape) of grid walls to achieve the best balance between scatter radiation absorption and primary radiation transmission. By carefully selecting and varying these parameters, the system maximizes scatter suppression while minimizing the reduction of primary radiation intensity
Solution Approach 2:
Different regions of the detector have grid walls with locally optimized parameters. Areas with higher scatter radiation receive grid walls with greater absorption capability, while areas with lower scatter radiation have grid walls optimized for primary radiation transmission, achieving overall optimal performance
3Ease of manufacture
If uniform grid wall parameters are used across the detector, then manufacturing is simplified, but non-uniform scatter-to-primary ratio degrades image quality
Solution Approach 1:
The patent implements local quality by configuring grid walls with different parameters (thickness, height, shape) at different locations across the detector array. This allows each region to have optimized local characteristics that achieve a uniform scatter-to-primary ratio, despite the increased manufacturing complexity
Solution Approach 2:
The detector is segmented into multiple regions, each with grid walls having specific local parameters. This segmentation allows independent optimization of grid wall characteristics for each region, achieving uniform scatter-to-primary ratio across the entire detector while maintaining manageable manufacturing through modular design
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
The anti-scatter grid significantly improves image quality by uniformly reducing scatter radiation, enhancing the contrast-to-noise ratio and maintaining the intensity of primary radiation, thus improving the overall performance of radiation imaging systems.
Implementation Method 1
the plurality of grid walls may be configured to arrive a uniform scatter-to-primary ratio
Data Source
AI summary
An anti-scatter grid, a detector with such an anti-scatter grid and a radiation imaging system including such a detector with an anti-scatter grid are provided. The anti-scatter grid includes at least one grid wall. The parameters of the grid wall may be adjusted to arrive a uniform scatter-to-primary ratio. The parameters of the grid wall comprise thickness, height, shape, or position of the grid wall, or width of interspace between two grid walls. The detector includes the anti-scatter grid, at least one photosensor, and at least one scintillator. The radiation system includes a radiation generator, a radiation detector with the anti-scatter grid, and a processor.