Rolled-Edge Cathode Shield for X-Ray Heat Transfer and Focusing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional smart cathode systems for X-ray imaging face challenges such as excessive heat generation, which can lead to component degradation and increased service time, as well as compromised image quality due to suboptimal shielding that blocks electric fields and focuses power.
Innovation Solution
A cathode shield assembly comprising a first and second shield part, where the first shield part includes a cathode mask and a disk shield, and the second shield part surrounds a lower extender, allowing increased radiation heat transfer while maintaining high voltage stability and focusing power by tuning the perimeter of the cathode mask to the size of coiled filaments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional shielding elements are used on cathode exterior surfaces, then high voltage stability is maintained, but heat transfer is restricted and image quality is compromised due to blocked electric fields
Solution Approach 1:
The cathode mask is divided into multiple segments or zones with different shielding characteristics. Certain areas have reduced shielding or openings that allow electric fields to pass through for improved image quality, while other areas maintain shielding for high voltage stability. This segmentation enables simultaneous optimization of both competing requirements.
Solution Approach 2:
Different regions of the cathode mask are assigned different shielding properties tailored to their specific functional requirements. Areas requiring electric field transmission have minimal shielding, while areas requiring high voltage protection maintain robust shielding. This local differentiation resolves the contradiction by applying the right shielding level in the right location.
2Reliability
If conventional shielding elements are used on cathode exterior surfaces, then high voltage stability is maintained, but service time increases due to component degradation from excessive heat
Solution Approach 1:
The shielding structure is segmented to create thermal pathways while maintaining electrical shielding. Openings or reduced-shielding zones allow heat to dissipate from critical components, reducing thermal accumulation that leads to degradation. This extends service life without compromising high voltage stability in protected areas.
Solution Approach 2:
The shielding design converts potentially harmful heat accumulation into beneficial heat dissipation pathways. By strategically positioning openings and varying shielding density, the design allows heat to escape from temperature-sensitive components while maintaining shielding where needed for electrical stability, thus extending service life.
3Reliability
If conventional shielding elements are used on cathode exterior surfaces, then high voltage stability is maintained, but image quality is compromised due to blocked electric fields
Solution Approach 1:
The cathode mask is segmented into regions with different shielding densities. Areas requiring precise image formation have reduced or optimized shielding that allows electric fields to pass through, while other areas maintain shielding for high voltage stability. This spatial segmentation enables both high voltage stability and image quality to coexist.
Solution Approach 2:
Different local regions of the cathode mask have tailored shielding properties matched to their functional requirements. Image-critical areas have optimized shielding for electric field transmission, while voltage-critical areas have robust shielding. This local quality differentiation resolves the contradiction between high voltage stability and image quality.
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 enhances heat transfer, increases electron focusing ability, and improves high voltage reliability, leading to longer cathode tube life, reduced service time, and lower operational costs.
Implementation Method 1
ionizing radiation is created by accelerating electrons in a vacuum from a cathode to an anode via an electric field
Implementation Method 2
accelerating electrons in a vacuum from a cathode to an anode
Implementation Method 3
allowing increased radiation heat transfer while maintaining high voltage stability
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Various systems are provided for a cathode of an X-ray imaging system. In one example, a shield for a cathode comprises a cathode mask (362) comprising a u-shaped central opening (340) configured to receive a cathode cup (62), where a perimeter (338) of the u-shaped central opening comprises a rolled over edge (718).