Dual-Energy Radiation Detector Arrangement with Variable Row Density
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Solution Overview
Problem
Existing radiation detector arrangements for dual-energy imaging require a high number of detectors across multiple energy ranges, leading to increased costs and complexity.
Innovation Solution
A radiation detector arrangement comprising a first plurality of detector rows for a first energy range and a second plurality of detector rows for a second energy range, with the second energy range being different from the first, and where the first plurality of detector rows are denser than the second plurality along the movement direction, optimized for efficient integration and reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high number of detectors are used across multiple energy ranges for dual-energy imaging, then material discrimination capability is improved, but device complexity and cost increase
Solution Approach 1:
The detector array is segmented into different regions with different spatial resolutions. A first region has a first spatial resolution suitable for detecting objects of a first size, while a second region has a second spatial resolution suitable for detecting objects of a second size. This segmentation allows each region to be optimized for specific detection tasks, reducing the need for uniformly high detector density across the entire array, thereby lowering complexity and cost while maintaining material discrimination capability.
Solution Approach 2:
Different regions of the detector array are assigned different spatial resolutions based on local detection requirements. The first region uses higher spatial resolution for small objects requiring detailed material discrimination, while the second region uses lower spatial resolution for larger objects where fine detail is less critical. This local quality approach optimizes resource allocation and reduces overall system complexity.
2Productivity
If detector rows are arranged for scanning moving objects, then imaging capability is improved, but the number of detectors required increases
Solution Approach 1:
The patent employs a dynamic scanning arrangement where the detector array scans moving objects rather than requiring all detectors to be simultaneously active for static imaging. This dynamic approach allows the use of fewer detectors that are sequentially positioned to capture images of moving objects, reducing the total quantity of detectors needed while maintaining imaging capability.
Solution Approach 2:
The scanning system operates with periodic action, where detector rows are activated in sequences corresponding to the movement of objects through the scanning field. This periodic activation pattern allows the same detectors to be reused across multiple scanning cycles, reducing the total number of detectors required compared to a static imaging system that would need all detectors simultaneously active.
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 proposed solution enables dual-energy imaging with reduced costs by optimizing the density of detector rows across different energy ranges, improving imaging efficiency while maintaining effective material discrimination and spatial resolution.
Implementation Method 1
a first plurality of detector rows configured to detect radiation in a first energy range; and a second plurality of detector rows configured to detect radiation in a second energy range
Implementation Method 2
the radiation detector arrangement further comprises at least one filter structure arranged to block at least part of radiation outside the second energy range from entering the second plurality of detector rows
Data Source
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AI summary
According to an embodiment, a radiation detector arrangement comprises: a first plurality of detector rows configured to detect radiation in a first energy range; and a second plurality of detector rows configured to detect radiation in a second energy range, wherein the second energy range is different from the first energy range; wherein the first plurality of detector rows and the second plurality of detector rows are arranged for scanning an object moving in a movement direction and a number of the first plurality of detector rows per distance along the movement direction is greater than a number of the second plurality of detector rows per distance along the movement direction.