X-ray Energy Spectrum Determination via Beam Deflection

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Solution Overview

Problem

Current radiation therapy systems face challenges in accurately determining the energy spectrum of electron beams, which is crucial for delivering precise radiation doses, as existing methods require inserting measurement devices into the accelerating tube system.

Innovation Solution

A method and system that utilize a beam deflection device to adjust deflection currents, determining energy ranges and target currents of ejected electron beams, allowing for the calculation of the energy spectrum of incident electron beams without the need for additional measurement devices in the accelerating tube system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If measurement devices are inserted into the accelerating tube system to determine electron beam energy spectrum, then measurement accuracy is improved, but device complexity and system intrusion increase

Engineering Contradiction:

Improveenergy spectrum measurement accuracyVSAvoidmeasurement system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent introduces a beam deflection device as an intermediary component that deflects electron beams based on their energy levels. This mediator separates electrons into different energy ranges without requiring direct insertion of measurement devices into the accelerating tube, thus maintaining measurement accuracy while reducing system intrusion and complexity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct physical measurement devices with a magnetic field-based deflection system. By using electromagnetic fields to deflect electron beams and measure deflection angles, the system avoids mechanical insertion of probes into the accelerating tube, reducing complexity while maintaining measurement precision

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Device complexity

If beam deflection device is used to determine energy spectrum by adjusting deflection currents, then device complexity is reduced, but measurement precision may be compromised

Engineering Contradiction:

Improvemeasurement system complexityVSAvoidenergy spectrum determination accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent employs dynamic adjustment of deflection currents in the beam deflection device to optimize electron beam separation. By dynamically varying the magnetic field strength through controlled current adjustment, the system achieves precise energy range separation and accurate spectrum determination while maintaining system simplicity

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the deflection angle parameter by adjusting deflection currents to correspond with different electron energy ranges. This parameter variation allows the system to accurately map electron energies to specific deflection angles, maintaining measurement precision while using a simpler non-intrusive measurement approach

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If multiple deflection currents are used to cover different energy ranges, then energy spectrum coverage is improved, but measurement time increases

Engineering Contradiction:

Improveenergy spectrum coverageVSAvoidmeasurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent uses periodic adjustment of deflection currents to systematically scan through different electron energy ranges. By implementing a structured sequence of current adjustments that correspond to different energy bins, the system achieves complete energy spectrum coverage while minimizing measurement time through efficient sequential sampling

Inventive Principle:

Principle #19Periodic action

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

Enables accurate determination of electron beam energy spectra without inserting devices into the accelerating tube, improving radiation dose precision and eliminating the need for complex measurement setups.

Implementation Method 1

determining a magnetic field strength generated by the beam deflection device based on the deflection current

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

determining an energy range of an ejected electron beam... determining a center energy value of the energy range of the ejected electron beam based on the magnetic field strength and a deflection radius

Methodology Applied

Scientific EffectLorentz force: Lorentz Force

Data Source

PatentUS11437225B2Method and system for determining energy spectrum of X-ray device

Publication Date: 2022.09.06 SHANGHAI UNITED IMAGING HEALTHCARE

AI summary

The present disclosure discloses a method and a system for determining an energy spectrum of an incident electron beam. The method includes obtaining a plurality of deflection currents of a beam deflection device; for each of the plurality of deflection currents, determining an energy range of an ejected electron beam, and determining a target current of a target generated by the ejected electron beam irradiating the target, wherein the ejected electron beam is emitted from an output of the beam deflection device after the incident electron beam enters the beam deflection device. The method also includes determining the energy spectrum of the incident electron beam based on the energy ranges of the plurality of ejected electron beams and the corresponding target currents.