Adaptive Anti-Scatter Device for Variable Source-Detector Distance
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Solution Overview
Problem
Conventional X-ray anti-scatter grids in imaging systems are limited by their fixed orientation, which reduces their effectiveness at variable source-to-image distances, leading to suboptimal scatter rejection and image quality.
Innovation Solution
An adaptive anti-scatter device with realignable slats and actively deformable actuators that adjust their alignment based on the source-to-image distance, utilizing 3D or 4D printing for compact and efficient manufacturing, allowing for precise control of slat angulation to effectively block scattered X-rays across a range of distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed orientation anti-scatter grid is used, then the structure is simple and easy to manufacture, but the scatter rejection effectiveness deteriorates at variable source-to-image distances
Solution Approach 1:
The patent applies the dynamics principle by making the anti-scatter grid adaptable through variable angulation of slats. The grid transitions from a fixed structure to a dynamic one where slats can be actively deformed to change their angle relative to the source-detector axis, allowing optimal scatter rejection at multiple source-to-image distances without complicating the manufacturing process
2Device complexity
If the slat angulation is fixed, then the device complexity is low, but the image quality deteriorates due to suboptimal scatter rejection at varying distances
Solution Approach 1:
The patent introduces dynamic angulation capability to the slats, allowing them to adjust their orientation based on the source-to-image distance. This dynamic adjustment mechanism, implemented through actively deformable actuators, enables the grid to maintain optimal image quality across varying distances while managing device complexity through integrated design
3Adaptability or versatility
If actively deformable actuators are integrated into the anti-scatter grid, then the adaptability to variable distances is improved, but the device complexity increases
Solution Approach 1:
The patent applies the merging principle by integrating actively deformable actuators directly into the anti-scatter grid structure. The actuators are combined with the slats and interstitial portions in a unified design, allowing the grid to achieve variable angulation capability while managing overall device complexity through consolidation of components
Solution Approach 2:
The patent utilizes the nested doll principle by placing actuators within the interstitial portions of the grid structure. This nesting approach allows the actively deformable elements to be housed within the existing grid framework, minimizing additional space requirements and reducing the overall complexity increase while maintaining full adaptability functionality
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 adaptive anti-scatter device ensures high-quality X-ray images by optimally rejecting scattered radiation across varying source-to-image distances, improving image quality and reducing primary radiation absorption due to defocus issues.
Implementation Method 1
The anti-scatter filter comprises a plurality of realignable slats for absorbing incident X-rays
Implementation Method 2
at least one actuator of the first set is configured to change the alignment of a corresponding slat of the anti-scatter filter in relation to the source-detector axis
Data Source
AI summary
An adaptive X-ray anti-scatter device for placement in a source-detector axis of an X-ray imager includes an anti-scatter filter having a source orientable surface and a detector orientable surface. The anti-scatter filter comprises a plurality of realignable slats that absorb incident X-rays and are separated by a plurality of interstitial portions. The device also includes a first actively deformable member comprising a first set of one or more actively deformable actuators disposed across a first region of the first actively deformable member. At least a portion of the first set is partially or fully recessed within the interstitial portions. At least one actuator of the first set is in contact with a corresponding realignable slat of the plurality of realignable slats and is configured to change the alignment of the corresponding realignable slat in relation to the source-detector axis.