Detector Array Phosphor Screen Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing CT imaging modalities face challenges in achieving precise alignment between scintillator and photodiode arrays, leading to lower image fidelity due to the complexity and cost of precision fixtures required for indirect conversion detector arrays.
Innovation Solution
A detector array configuration featuring a phosphor screen that extends continuously over a photodiode array, eliminating the need for reflective material between photodiode channels and allowing direct deposition of phosphor materials, thereby simplifying alignment and reducing manufacturing complexity while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If precision fixtures and processes are used to align scintillator and photodiode arrays, then alignment precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the scintillator array and photodiode array into a single integrated detector array structure, where the scintillator layer is deposited directly over the photodiode array without requiring separate alignment fixtures. This merging eliminates the need for complex precision alignment processes while maintaining detection functionality.
Solution Approach 2:
The patent introduces a reflective layer as an intermediary component between the scintillator and photodiode arrays. This reflective layer serves multiple functions: it reflects light back toward the photodiodes, provides a structural interface that simplifies alignment, and reduces the need for complex precision fixtures by acting as a self-aligning intermediary structure.
2Manufacturing precision
If precision fixtures and processes are used to align scintillator and photodiode arrays, then alignment precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the scintillator array and photodiode array into a single integrated detector array structure, where the scintillator layer is deposited directly over the photodiode array without requiring separate alignment fixtures. This merging eliminates the need for complex precision alignment processes while maintaining detection functionality.
Solution Approach 2:
The patent replaces expensive precision alignment fixtures with a simpler, more cost-effective integrated structure that uses standard manufacturing processes. The reflective layer and direct deposition method use conventional materials and techniques rather than specialized expensive equipment.
3Use of energy by moving object
If reflective material is placed between photodiode channels, then light reflection is improved, but device complexity increases
Solution Approach 1:
The patent merges the reflective function into the overall detector array structure by using a reflective layer that is integrated with the scintillator and photodiode arrays. This eliminates the need for separate reflective material placement between channels, reducing device complexity while maintaining light reflection efficiency.
Solution Approach 2:
The reflective layer serves multiple functions simultaneously: it reflects light back toward the photodiodes, provides structural support, simplifies alignment, and reduces the need for additional components. This multi-functionality reduces overall device complexity while maintaining or improving light reflection efficiency.
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 reduces manufacturing costs and complexity while achieving acceptable image quality, providing an economical solution for security CT imaging systems with improved ease of assembly and comparable image resolution to traditional pixelated scintillator arrays.
Implementation Method 1
a phosphor screen configured to convert the radiation photons into light energy
Implementation Method 2
a photodiode array comprising a plurality of photodiodes configured to convert the light energy into electrical charge
Data Source
AI summary
A detector array is provided for detecting radiation photons. The detector array includes a phosphor screen that converts radiation photons into light energy. The detector array includes a photodiode array having a plurality of photodiodes that convert the light energy into electrical charge. A first photodiode of the plurality of photodiodes is spaced apart from a second photodiode of the plurality of photodiodes to define a non-detection region. The phosphor screen overlies the first photodiode, the second photodiode, and the non-detection region between the first photodiode and the second photodiode.