Scintillator Panel Phosphor Packing Density
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Solution Overview
Problem
Scintillator panels used in X-ray detectors have insufficient sensitivity and sharpness, despite efforts to increase phosphor density, which leads to reduced light emission and image quality.
Innovation Solution
A scintillator panel with a base plate and a scintillator layer containing a binder resin, phosphor, and a compound represented by a specific general formula, which enhances phosphor packing density and maintains sensitivity while improving sharpness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the amount of phosphor per unit exposure area in the scintillator layer is increased to improve sensitivity, then the sensitivity is improved, but the thickness of the scintillator layer increases proportionally, causing light scattering and decreasing sharpness
Solution Approach 1:
The invention changes the physical and chemical parameters of the binder resin by specifying particular types (polyester resin, polyurethane resin, polyacrylic resin, or epoxy resin) and their properties. This optimization of binder resin parameters enables higher phosphor packing density without increasing layer thickness, thereby improving sensitivity while maintaining sharpness
Solution Approach 2:
The invention uses composite materials by combining specific types of binder resins with phosphor particles in optimized ratios. The composite scintillator layer structure allows dense phosphor packing while the binder resin matrix prevents light scattering, resolving the contradiction between sensitivity and sharpness
2Measurement precision
If the thickness of the scintillator layer is increased to improve sensitivity, then the sensitivity is improved, but light emitted in the scintillator layer is more likely to be scattered, resulting in a decrease in sharpness
Solution Approach 1:
The invention optimizes the thickness parameter of the scintillator layer to a specific range (50-200 μm) and changes the phosphor packing density parameter. By increasing phosphor density within this controlled thickness range rather than increasing thickness itself, sensitivity is improved without excessive light scattering, thus maintaining sharpness
3Quantity of substance
If a coupling agent or surfactant is added to pack phosphor densely, then phosphor packing density is increased, but the complexity of the scintillator layer composition increases
Solution Approach 1:
The invention extracts and eliminates the need for separate coupling agents or surfactants by incorporating their functional effects directly into the binder resin itself. The binder resin is selected and formulated to provide both binding and phosphor dispersion functions, simplifying the overall composition while achieving dense phosphor packing
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 scintillator panel achieves excellent sensitivity and sharpness by densely packing phosphors, allowing for efficient light emission and improved image quality without increasing the thickness of the scintillator layer.
Implementation Method 1
a scintillator panel having a base plate and a scintillator layer containing a binder resin and a phosphor
Implementation Method 2
the scintillator layer further containing a compound represented by the following general formula (1) and/or a salt thereof
Data Source
Figure 1~2
AI summary
A problem addressed by the present invention is to provide a scintillator panel having excellent sensitivity and sharpness, and the spirit of the present invention is that the scintillator panel includes a base plate and a scintillator layer containing a binder resin and a phosphor, said scintillator layer further containing a compound represented by the following general formula (1) and/or a salt thereof; (wherein, in the general formula (1), R represents a C1-30 hydrocarbon group; m represents an integer of 1 to 20; n represents 1 or 2; and when n is 2, a plurality of Rs may be the same or different).