Multi-Source X-Ray Tube Layout for 2D and 3D Dose Flexibility
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Solution Overview
Problem
Stationary tomosynthesis using a multi-source x-ray tube often results in insufficient dose for certain higher dose two-dimensional (2D) imaging.
Innovation Solution
A multi-source x-ray system with multiple emitters and targets configured to generate different x-ray fluxes, allowing for both lower dose three-dimensional (3D) imaging and higher dose two-dimensional (2D) imaging by utilizing emitters with varying maximum currents and focal spot configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-source x-ray tube with multiple nanotube emitters is used for stationary tomosynthesis, then 3D imaging capability is achieved, but the x-ray dose is insufficient for higher dose 2D imaging
Solution Approach 1:
The x-ray tube is segmented into multiple independent emitters (first emitter, second emitter, third emitter) with different focal spot configurations. Each emitter can be independently controlled to produce different x-ray flux levels, allowing the system to switch between tomosynthesis mode (using multiple emitters) and 2D imaging mode (using a single high-current emitter), thus resolving the contradiction between imaging versatility and dose sufficiency
Solution Approach 2:
Different regions of the target are designed with different properties to serve different functions. The target includes multiple focal spots with varying current capacities - some optimized for low-dose tomosynthesis and others for high-dose 2D imaging. This local differentiation allows each emitter-target pair to be optimized for specific imaging requirements, enabling both 3D and 2D imaging capabilities within a single tube
2Adaptability or versatility
If multiple x-ray sources with different electron emitters and targets are used to achieve varying x-ray fluxes, then imaging capabilities are expanded, but device complexity increases
Solution Approach 1:
Multiple emitters with different characteristics are merged into a single x-ray tube assembly, sharing common components such as the vacuum envelope, high voltage supply, and control electronics. This consolidation achieves the benefits of multiple specialized sources while minimizing the increase in overall system complexity through shared infrastructure
Solution Approach 2:
The x-ray tube is designed as a universal platform that can perform multiple imaging functions (tomosynthesis, 2D imaging, magnification imaging) using different combinations of its emitters. The control system can selectively activate appropriate emitter pairs based on the desired imaging mode, making the device multi-functional without requiring separate specialized tubes for each application
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 system achieves improved imaging capabilities, including higher resolution and reduced motion blur, while maintaining flexibility for different imaging applications through a single setup.
Implementation Method 1
an electron emitter configured to generate an electron beam
Implementation Method 2
a target configured to convert the electron beam into an x-ray beam
Data Source
AI summary
Some embodiments include a system, comprising: at least one x-ray source, each x-ray source including: an electron source configured to generate an electron beam; and a target configured to receive the electron beam and convert the electron beam into an x-ray beam; and a collimator. A first edge of the collimator closest to the electron source is closer to the electron source than a central axis of the x-ray beam before entering the collimator; and a second edge of the collimator opposite to the first edge is at the central axis of the x-ray beam before entering the collimator or closer to the electron source than the central axis of the x-ray beam before entering the collimator.