Photon Detection Apparatus with Segmented Counting for High Dose Linearity
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Solution Overview
Problem
Conventional radiation detection methods using photon counting face challenges in maintaining linearity at high radiation doses due to counting losses from pile-up effects.
Innovation Solution
A detection apparatus with a configuration of one first detector and multiple second detectors, where the first detector is positioned centrally and the second detectors are arranged in an array, utilizing a scintillator and adhesive layer to convert radiation into electric signals, and employing a processing unit to manage signal output from both detectors to maintain linearity by selecting the appropriate counting rate based on reference values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a photon counting method is used to measure radiation, then measurement precision is improved at low photon numbers, but counting loss due to pile-up occurs at high photon numbers
Solution Approach 1:
The detection apparatus is divided into multiple independent detection units (first detection unit and second detection unit), each capable of independently counting photons. By segmenting the detection function across multiple units, the system can handle high photon fluxes without pile-up effects in any single unit, thereby maintaining measurement precision and reliability across a wide range of radiation doses.
2Productivity
If multiple detectors are used to increase detection capacity, then productivity is improved, but device complexity increases
Solution Approach 1:
The first detection unit and second detection unit are merged into a single integrated detection apparatus with a unified structure. Both detection units share common components and are coordinated by a single processing unit, which selects or combines counting rates from either unit. This merging approach increases detection capacity while avoiding the complexity of fully independent multi-detector systems.
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 enables accurate and linear radiation detection even at high photon counts by effectively managing counting rates and minimizing pile-up effects, ensuring reliable measurement across varying radiation doses.
Implementation Method 1
a scintillator (4), which converts radiation and emits the radiation as visible light
Implementation Method 2
a first photodetector (2), which converts the photon into an electric signal
Data Source
AI summary
A detection apparatus according to an embodiment includes first detectors, a first electrode, second detectors and a second electrode. The first detectors detect a photon. The first electrode is electrically connected to each of the first detectors. The second detectors detect a photon. The second electrode is electrically connected to each of the second detectors. The number of first detectors is less than the number of second detectors.