Comb-Shaped Deflection Electrode Assembly for Dense X-Ray Focus Spots
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Solution Overview
Problem
Existing X-ray sources with multiple cathodes and targets face complexity in installation, electrical insulation, and high cost due to numerous independent electrodes, leading to motion artifacts and suboptimal image quality in 3D imaging.
Innovation Solution
A deflection electrode assembly with a comb-shaped structure featuring staggered tooth portions on two electrode plates, allowing for simplified installation, electrical connection, and increased electron beam passageways, reducing the number of components and enhancing imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple independent electrodes are used to increase the number of focus spots, then the number of X-ray emission positions increases, but the device complexity and installation difficulty increase significantly
Solution Approach 1:
The patent combines multiple independent electrodes into a single integrated deflection electrode assembly with a comb-shaped structure. The first and second electrode plates are integrated into one component, reducing the number of separate parts while maintaining multiple electron beam passageways for generating multiple focus spots.
Solution Approach 2:
The deflection electrode assembly is segmented into multiple tooth portions (first tooth portions and second tooth portions) that create separate electron beam passageways. This segmentation allows multiple electron beams to pass through different regions while using a single integrated electrode structure.
2Quantity of substance
If multiple independent electrodes are used to generate electron beams from different positions, then the focus spot distribution density increases, but the electrical insulation requirements and installation complexity increase
Solution Approach 1:
The patent merges multiple electrodes into a single deflection electrode assembly where the first and second electrode plates form an integrated structure. This eliminates the need for complex electrical insulation between multiple independent electrodes while maintaining the ability to generate electron beams from different positions.
Solution Approach 2:
The comb-shaped structure with staggered tooth portions acts as an intermediary that naturally provides electrical insulation through its geometric configuration. The alternating first and second tooth portions create physical separation and insulation without requiring additional insulating materials or complex installation procedures.
3Quantity of substance
If traditional hot cathode distributed light source is used, then multiple electron beams can be generated, but the cathode spacing is large due to physical size and thermal insulation requirements, reducing focus spot density
Solution Approach 1:
The patent replaces the traditional hot cathode system with a deflection electrode system that uses electric fields to control electron beam trajectories. This substitution eliminates the need for physically large hot cathodes with thermal insulation requirements, allowing for much smaller spacing between electron emission regions.
Solution Approach 2:
The patent changes the fundamental operating parameters by using cold cathode field emission instead of hot cathode thermionic emission. This parameter change allows for significantly reduced spacing between emission regions while maintaining the ability to generate multiple electron beams.
4Adaptability or versatility
If electromagnetic field scanning is used to deflect electron beams, then focus spot positions can be changed continuously, but motion artifacts are generated in X-ray imaging
Solution Approach 1:
The patent uses periodic switching between discrete electron beam passageways instead of continuous scanning. Each cathode unit emits electron beams through specific passageways in a periodic sequence, creating discrete focus spots without the continuous motion that causes artifacts.
Solution Approach 2:
The patent segments the electron beam path into discrete passageways rather than using continuous deflection. This segmentation allows for discrete, artifact-free focus spot positions while maintaining the ability to change focus spot locations by switching between different passageway configurations.
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 deflection electrode assembly simplifies installation and reduces costs while increasing the number of X-ray emission positions, improving image quality and resolution in X-ray imaging systems.
Implementation Method 1
The plurality of first tooth portions and the plurality of second tooth portions are at least partially staggered to form a plurality of electron beam passageways
Implementation Method 2
deflects the electron beams through electromagnetic field scanning to generate focus spots with different positions
Implementation Method 3
The cathode generates an electron beam. The electron beam is accelerated by a high voltage electric field between the cathode and anode
Data Source
AI summary
The present application relates to a deflection electrode assembly, an X-ray source, and an X-ray imaging system. The deflection electrode assembly includes: a first electrode plate, including a first connection portion and a plurality of first tooth portions, wherein the first electrode plate is formed as a comb shape; and a second electrode plate, including a second connection portion and a plurality of second tooth portions, wherein the second electrode plate is formed as a comb shape. The first electrode plate and the second electrode plate are not in contact with each other, and the plurality of first tooth portions and the plurality of second tooth portions are arranged at least partially in a staggered manner to form a plurality of electron beam passageways; each electron beam passageway is located between adjacent first and second tooth portions.