Anti-Scatter Grid Selection for Variable X-Ray Imaging
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Solution Overview
Problem
Current x-ray imaging systems face challenges in maintaining optimal image quality and radiation dose due to variable x-ray source to detector distances, which require fixed focal length anti-scatter grids, leading to suboptimal performance in varying imaging modes and situations like pediatric or extremity imaging where grid usage is undesirable.
Innovation Solution
The system incorporates multiple anti-scatter grids with different focal lengths and properties stored in accessible slots, allowing operators to select the appropriate grid based on imaging mode, with sensors detecting grid presence and properties to ensure optimal usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed focal length anti-scatter grid is used, then the grid structure is simple and cost-effective, but the system cannot adapt to variable x-ray source to detector distances and different imaging modes
Solution Approach 1:
The anti-scatter grid system is segmented into multiple independent grids with different focal lengths, each stored in separate storage slots. This allows the system to divide the single-grid function into multiple specialized grids, enabling adaptation to different imaging distances and modes without requiring a complex adjustable single-grid mechanism.
Solution Approach 2:
The grid system is designed with multi-functionality by incorporating multiple grids that can handle various imaging scenarios (general radiography, fluoroscopy, pediatric, extremity imaging) within a single system. The sensor system and controller work together to automatically select the appropriate grid, making the system universally applicable to different imaging modes and distances.
2Adaptability or versatility
If multiple anti-scatter grids are stored in the system, then adaptability to different imaging modes is improved, but the device complexity and space requirements increase
Solution Approach 1:
Multiple anti-scatter grids are nested within the imaging system structure, with each grid stored in dedicated storage slots that are integrated into the existing system architecture. This nesting approach allows multiple grids to be housed within the limited space of the imaging system without requiring external storage areas, efficiently utilizing the available volume.
3Measurement precision
If sensors are added to detect grid presence and properties, then grid selection accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The sensor system automatically detects the presence and properties of anti-scatter grids without requiring manual input or complex external equipment. The controller uses this sensor data to automatically determine the appropriate grid selection, making the system self-sufficient in its grid management and reducing the need for additional complex control mechanisms.
4Manufacturing precision
If a general-purpose anti-scatter grid is used at fixed focal length, then the grid structure is simple, but image quality deteriorates when x-ray source to detector distance varies significantly
Solution Approach 1:
Different anti-scatter grids are designed with specific local qualities optimized for particular imaging distances and modes. Each grid's focal length and strip configuration are tailored to specific imaging scenarios, ensuring optimal image quality for each local condition (pediatric, extremity, general radiography, fluoroscopy) rather than using a single general-purpose grid.
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 solution enables flexible selection of anti-scatter grids, improving image quality and radiation management across different imaging scenarios without the need for frequent grid replacements, enhancing the versatility and effectiveness of x-ray imaging systems.
Implementation Method 1
an operational slot sensor configured to detect the presence of an anti-scatter grid and/or an imaging property of a grid in the operational slot
Implementation Method 2
anti-scatter grids are typically fabricated from thin strips of x-ray absorbing material, e.g., lead, that are arranged in a geometric pattern to absorb scattered radiation
Data Source
AI summary
An apparatus for reducing radiation scatter in an imaging system having an operational slot for receiving an anti-scatter grid. The apparatus includes an imaging system component having at least one storage slot formed therein for selectively storing an anti-scatter grid when the grid is not in the operational slot of the imaging system. The apparatus further includes an operational slot sensor configured to detect the presence of an anti-scatter grid and/or an imaging property of a grid in the operational slot. The system allows an operator to select an appropriate anti-scatter grid for use in the imaging system from one or more anti-scatter grids that are located within the operational and/or storage slots of the imaging system.