PCB Scintillator Cavities for Low-Cost Dual-Energy X-Ray Detection
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Solution Overview
Problem
X-ray detectors are often expensive due to manufacturing costs, necessitating the development of more cost-effective solutions.
Innovation Solution
A printed circuit board (PCB) with a hole or cavity containing a scintillator material that converts radiation in a first energy range to a lower energy range, utilizing metallic materials to reflect radiation and photodiodes to detect the converted energy, allowing for dual-energy detection with varying thicknesses of scintillator material to optimize absorption and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional X-ray detector manufacturing methods are used, then detection performance is achieved, but manufacturing cost is high
Solution Approach 1:
The detector is segmented into modular components (scintillator material, photodiode, PCB substrate with holes) that can be manufactured separately and assembled. This allows each component to be optimized independently and reduces overall manufacturing complexity and cost.
Solution Approach 2:
The patent varies the thickness of the scintillator material to optimize detection performance for different energy ranges. By changing this physical parameter, the system achieves dual-energy detection capability without requiring completely different detector designs, reducing development and manufacturing costs.
2Reliability
If scintillator material thickness is increased to maximize absorption, then detection efficiency improves, but material usage and cost increase
Solution Approach 1:
Different regions of the detector have different scintillator material thicknesses optimized for specific energy ranges. High-energy detection holes have thicker scintillator material while low-energy holes have thinner material, allowing each region to use only the amount of material necessary for its specific function.
Solution Approach 2:
The patent uses just enough scintillator material thickness to achieve the required detection efficiency for each energy range, avoiding excessive material usage. The thickness is precisely controlled to be sufficient for the intended purpose without being overly generous.
3Adaptability or versatility
If dual-energy detection is implemented, then detection capability is enhanced, but device complexity increases
Solution Approach 1:
The detector uses a single PCB substrate with multiple holes that can detect both high and low energy ranges. The photodiode and scintillator material arrangement provides multi-functionality, allowing one device to perform dual-energy detection without requiring separate detector systems.
Solution Approach 2:
The patent combines high-energy and low-energy detection capabilities into a single integrated detector structure. Multiple detection functions are merged into one device, reducing the overall system complexity compared to using separate detectors for different energy ranges.
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 solution enables low-cost X-ray detection by maximizing absorption and minimizing material usage, achieving efficient dual-energy detection with reduced manufacturing costs.
Implementation Method 1
a scintillator material is arranged to the hole along a depth direction of the hole such that the scintillator material comprises a thickness; and wherein the thickness of the scintillator material is configured to be such that the scintillator material converts radiation in a first energy range to radiation in a second energy range
Implementation Method 2
a metallic material is arranged to at least a portion of at least one wall of the hole and the metallic material is configured to at least partially reflect radiation in the first energy range
Implementation Method 3
a first opening, wherein a photodiode is arranged to the first opening; and wherein the second energy range is detectable by the photodiode
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C
AI summary
Various example embodiments relate to a PCB for radiation detection. Example embodiments may comprise: a hole, wherein a scintillator material is arranged to the hole along a depth direction of the hole such that the scintillator material comprises a thickness; and wherein the thickness of the scintillator material is configured to be such that the scintillator material converts radiation in a first energy range to radiation in a second energy range, the second energy range comprising lower energies than the first energy range.