Anti-scatter Grid End Stop for Sensor Positioning
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Solution Overview
Problem
Existing anti-scatter grids in medical imaging devices face challenges in achieving precise positioning relative to sensor elements, leading to suboptimal image quality due to tolerance issues in mechanical components and mounting tools.
Innovation Solution
An anti-scatter grid with a collimator element featuring end stop elements protruding beyond the wall height, allowing for precise orientation and positioning of the sensor element without relying on external mounting tools, thereby reducing tolerance errors and improving image quality by absorbing scattered X-ray radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mounting tools with end stop surfaces are used to position the anti-scatter grid and sensor element, then the components can be assembled, but the positioning accuracy is compromised due to accumulated tolerances from multiple mechanical interfaces
Solution Approach 1:
The end stop functionality is extracted from the mounting tool and integrated directly into the anti-scatter grid structure. The collimator walls themselves serve as the positioning reference, eliminating the need for separate mounting tool end stops and reducing the tolerance chain.
Solution Approach 2:
The anti-scatter grid structure provides its own positioning function through the collimator walls that define both the radiation filtration geometry and the mechanical reference for sensor placement. The system serves its positioning function through its own structural elements rather than requiring external tools.
2Manufacturing precision
If multiple tolerance sources are considered in the mounting process, then comprehensive positioning can be achieved, but the production quality requirements and mechanical effort increase significantly
Solution Approach 1:
The positioning reference function is merged with the collimator wall structure. The same structural elements that define the radiation geometry also serve as the mechanical reference for positioning, combining multiple functions into a single integrated feature.
Solution Approach 2:
The collimator walls serve multiple functions: radiation filtration, structural support, and positioning reference. This multi-functionality eliminates the need for separate positioning features and reduces the number of tolerance-critical interfaces.
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 solution enables more accurate and efficient assembly of anti-scatter grids with sensor elements, enhancing image quality by effectively suppressing scattered radiation and reducing the need for complex assembly tools.
Implementation Method 1
Since, on passing through the object, dependent upon local properties of the object, the X-ray radiation interacts and for example is attenuated
Data Source
AI summary
An anti-scatter grid for stacked arrangement with a sensor element for the detection of X-ray radiation having a collimator element with a plurality of collimator walls having a wall height, that are arranged adjoining one another in at least one first direction perpendicularly to the stacking direction of the stacked arrangement. At least one collimator wall of the collimator element has at least one end stop element in the form of a protrusion protruding beyond the wall height along the stacking direction for a positioning of the sensor element relative to the collimator element.