Static Annular X-Ray Source for Dual-Energy CT
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Solution Overview
Problem
Conventional computed tomography (CT) systems requiring dual-energy imaging are mechanically complex and costly due to the need for rotating components, leading to increased space occupation and servicing expenses.
Innovation Solution
A computed tomography system with an annular x-ray source and detector arrangement, where partial x-ray sources are activated individually to generate multiple x-ray spectra without physical rotation, allowing for dual-energy imaging with a less robust and space-saving design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual-source CT devices with two rotating measuring systems are used to implement dual-energy CT, then dual-energy imaging capability is achieved, but device complexity and space occupation increase
Solution Approach 1:
The x-ray source is divided into multiple independent partial x-ray sources arranged in an annular configuration. Each partial source can be activated independently to generate different x-ray spectra, eliminating the need for rotating components while achieving spectral diversity through selective activation of source segments.
Solution Approach 2:
The patent replaces the mechanical rotation system with a static annular arrangement. Instead of physically rotating a single x-ray source to achieve different angular positions and energies, multiple partial sources are positioned statically around the examination region, with electronic control activating specific sources to generate the required spectral information.
2Loss of information
If two third-generation measuring systems rotate about the subject for dual-energy CT, then spectral data can be recorded, but servicing expense increases due to mechanical wear
Solution Approach 1:
The rotating mechanical system is replaced with a static annular configuration of partial x-ray sources. This eliminates moving parts, rotational bearings, and associated mechanical wear, thereby reducing servicing requirements and expenses while maintaining the ability to acquire spectral data through selective source activation.
Solution Approach 2:
The static annular array of partial x-ray sources serves multiple functions: it provides spectral diversity through selective activation, maintains fixed geometric relationships for consistent imaging, and eliminates the need for mechanical rotation while achieving the same diagnostic information.
3Adaptability or versatility
If robust construction with rotating components is used for dual-source CT, then dual-energy imaging is enabled, but space occupation increases
Solution Approach 1:
The x-ray source is segmented into multiple partial sources arranged in a compact annular configuration around the examination region. This segmentation allows each partial source to be positioned closer to the isocenter, reducing the overall footprint and space requirements while maintaining dual-energy imaging capability through selective source activation.
Solution Approach 2:
The patent transitions from a linear rotation path to a two-dimensional annular arrangement of partial sources. This spatial reconfiguration allows multiple sources to be positioned concentrically around the examination region, reducing the radial and axial space requirements compared to a rotating system with extended mechanical components.
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
This approach enables efficient dual-energy imaging with reduced mechanical complexity and servicing costs, while maintaining the ability to generate multiple x-ray spectra for detailed spectral data capture.
Implementation Method 1
an annular x-ray source having a plurality of partial x-ray sources which are arranged around an examination region in the form of a circle or part-circle... generate at least a first x-ray spectrum using a first group of the partial x-ray sources and a second x-ray spectrum, distinguishable from the first, using a second group of the partial x-ray sources
Implementation Method 2
a detector annulus having a plurality of x-ray detectors which are arranged around an examination region in the form of a circle or part-circle... record an x-ray signal in a spectrally distinguishable manner
Data Source
AI summary
A computed tomography system comprising an annular x-ray source having a plurality of partial x-ray sources around an examination region and a detector annulus having a plurality of x-ray detectors around an examination region. The computed tomography system is configured to activate the partial x-ray sources individually during a computed tomography scan using a static x-ray source and a static detector annulus to generate absorption profiles of an object in the examination region from a plurality of directions. The computed tomography system is configured to at least one of generate at least a first x-ray spectrum using a first group of the partial x-ray sources and a second x-ray spectrum, distinguishable from the first, using a second group of the partial x-ray sources during the computed tomography scan, or is configured to record an x-ray signal in a spectrally distinguishable manner using the x-ray detectors.