Radiation Detector Array with Filter Segmentation for Beam Quality
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Solution Overview
Problem
Current radiation systems, particularly those using high-energy x-ray sources like electron linear accelerators, face challenges in accurately monitoring and maintaining the quality of radiation beams due to uncontrolled variations in energy output, which affects material characterization and discrimination.
Innovation Solution
A radiation system with a detector array and radiation filter material is configured to detect beam quality by exposing different portions of the detector array to varying filter thicknesses or compositions, allowing for consistent measurement of radiation energy across the array, enabling the calculation of beam quality parameters like the half-value layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a reference detector is used to monitor total x-ray output, then the total energy output can be measured, but beam-quality information cannot be provided
Solution Approach 1:
The detector array is segmented into multiple detector elements, each positioned behind different thicknesses of radiation filter material. This segmentation allows the system to measure both total energy output and beam quality by comparing signals from detectors with different filter configurations, resolving the contradiction between measuring total energy and obtaining beam quality information.
Solution Approach 2:
Radiation filter material is introduced as an intermediary element between the x-ray source and the detector array. The filter material interacts with the radiation beam to produce measurable differences in signal intensity that correspond to beam quality characteristics, enabling the system to extract beam quality information while maintaining total energy measurement capability.
2Measurement precision
If filter material is placed between the source and detector array, then beam quality can be detected, but the system complexity increases
Solution Approach 1:
The radiation filter material is merged with the detector array structure, where filter elements are positioned directly behind corresponding detector elements. This integration combines the filtering function with the detection function in a unified structure, reducing system complexity while maintaining beam quality detection capability.
Solution Approach 2:
The detector array serves multiple functions simultaneously: it measures total energy output, detects beam quality characteristics, and provides spatial information about radiation distribution. The filter material elements serve both as quality indicators and as part of the detection system structure, reducing the need for separate dedicated components.
3Measurement precision
If different portions of the detector array are exposed to varying filter thicknesses, then beam quality parameters can be calculated, but the manufacturing precision requirements increase
Solution Approach 1:
Different portions of the detector array are assigned different filter thicknesses to create local variations in radiation attenuation. This local quality differentiation allows the system to calculate beam quality parameters by analyzing the relative signals from detectors with known different filter thicknesses, providing a direct measurement approach that reduces manufacturing precision requirements compared to uniform structures.
Solution Approach 2:
The filter material is pre-configured with specific thickness variations during assembly, establishing known reference conditions before the measurement process. This preliminary action creates a controlled basis for calculating beam quality parameters, as the filter thickness variations are predetermined and can be used as calibration references.
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 configuration allows for accurate and consistent monitoring of radiation beam quality, enhancing material discrimination and image creation by accounting for energy variations, ensuring reliable performance over time and during manufacturing.
Implementation Method 1
The radiation filter material is disposed at least partially between the radiation source and the detector array such that different portions of the detector array are exposed to radiation from the radiation source through either different radiation filter material thicknesses or different radiation filter material compositions
Implementation Method 2
The detector array includes radiation detectors operatively coupled to detector electronics... different portions of the detector array are exposed to radiation from the radiation source
Data Source
AI summary
A detector array is disposed relative to a radiation source such that radiation from the radiation source over a predetermined time period is substantially similar across the detector array. The detector array includes radiation detectors operatively coupled to detector electronics. The radiation filter material is disposed at least partially between the radiation source and the detector array such that different portions of the detector array are exposed to radiation from the radiation source through either different radiation filter material thicknesses or different radiation filter material compositions during the predetermined time period. So configured, information regarding the radiation such as beam quality information for radiation pulses is collected and used to confirm the quality of the radiation source or to adjust data collected by the radiation system.