Scintillator Panel Assembly for Large-Area High-Resolution Radiation Detection
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Solution Overview
Problem
Radiation detectors face a challenge in increasing the area of the radiation detection region while maintaining high-resolution radiological images, as scintillator panels with granular phosphor layers can expand area but not resolution, and those with columnar crystals can improve resolution but not area.
Innovation Solution
A radiation detector design featuring two scintillator panels with columnar crystals, each attached to a sensor panel with an adhesive layer, where the scintillator layers extend to cover each other's edges, allowing for a larger detection area and improved image resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a scintillator layer is formed of a granular phosphor and binder resin to increase the area of the scintillator panel, then the area of the radiation detection region is increased, but a high-resolution radiological image is difficult to be obtained
Solution Approach 1:
The scintillator panel is divided into multiple smaller scintillator panels (first scintillator panel, second scintillator panel, etc.) that are arranged adjacently. Each panel is formed with columnar crystals maintaining high resolution, while the collective arrangement achieves the desired large detection area. The segmentation allows each panel to be manufactured with precise columnar crystal structures while the overall system provides extended coverage.
Solution Approach 2:
Instead of increasing the area of a single scintillator panel, the invention transitions to a multi-panel arrangement where multiple panels are disposed adjacently in a two-dimensional array. This dimensional approach allows the radiation detection region to be expanded by adding more panels in different directions while each individual panel maintains its high-resolution columnar crystal structure.
2Measurement precision
If a scintillator layer is formed of a plurality of columnar crystals to obtain a high-resolution radiological image, then the resolution is improved, but the area of the scintillator panel is difficult to be increased
Solution Approach 1:
Multiple scintillator panels, each formed with columnar crystals for high resolution, are merged by disposing them adjacently and bonding them together using adhesive layers. The merging of multiple high-resolution panels creates a large-area scintillator assembly that maintains the resolution benefits of columnar crystals while achieving the desired detection area through combination of multiple units.
Solution Approach 2:
The invention resolves the area limitation by transitioning from a single large panel to multiple smaller panels arranged in a two-dimensional configuration. Each panel maintains its columnar crystal structure for high resolution, while the overall assembly achieves large detection area through spatial arrangement and combination of multiple panels in different positions.
3Area of stationary object
If multiple scintillator panels are disposed adjacently to increase detection area, then the area of radiation detection region is increased, but the panels may be released from the light receiving surface
Solution Approach 1:
Adhesive layers are introduced as intermediary materials between the light receiving surface and each scintillator panel, and between adjacent scintillator panels. These adhesive layers provide reliable bonding that secures the panels to the light receiving surface and to each other, preventing release or detachment while allowing the multi-panel configuration to maintain its large detection area.
Solution Approach 2:
The adhesive layers are configured to be substantially transparent to scintillation light, maintaining optical properties while providing mechanical bonding. This allows the adhesive to perform its attachment function without significantly interfering with the light transmission necessary for detecting scintillation signals from the columnar crystals.
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 both an increased area of the radiation detection region and enhanced resolution of radiological images, with flexible substrates and protective layers ensuring reliable attachment and protection of columnar crystals.
Implementation Method 1
an adhesive layer disposed between the light receiving surface and the first scintillator panel and between the light receiving surface and the second scintillator panel
Implementation Method 2
the first scintillator layer includes a plurality of columnar crystals formed on the first substrate, the second scintillator layer includes a plurality of columnar crystals formed on the second substrate
Data Source
AI summary
A radiation detector includes a sensor panel having a light receiving surface, a first scintillator panel and a second scintillator panel disposed on the light receiving surface in a state of being adjacent to each other along the light receiving surface, and an adhesive layer. The first scintillator panel has a first substrate and a first scintillator layer including a plurality of columnar crystals. The second scintillator panel has a second substrate and a second scintillator layer including a plurality of columnar crystals. The first scintillator layer reaches at least a first portion of the first substrate. The second scintillator layer reaches at least a second portion of the second substrate. The adhesive layer is provided continuous over the first scintillator panel and the second scintillator panel.