Dielectric Shield for X-Ray Detector Noise Reduction

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Solution Overview

Problem

Current X-ray detector systems face challenges with high voltage arcing and background noise due to optical and infrared radiation leakage, which affect the accuracy and reliability of radiation detection in CT imaging systems.

Innovation Solution

An X-ray detector module is designed with an optically opaque, infrared radiation opaque, and electrically insulating dielectric detector shield that covers the detection surface and sides of the radiation sensors, reducing noise and arcing while maintaining high sensitivity and energy resolution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If no shield is used, then the detector structure is simple, but optical and infrared radiation leakage causes high voltage arcing and background noise

Engineering Contradiction:

Improvedetector structureVSAvoiddetection accuracy

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

A dielectric shield material is introduced as an intermediary component between the radiation sensor and the external environment. This shield acts as a mediator that blocks optical and infrared radiation while maintaining electrical insulation, thereby preventing arcing and background noise without significantly complicating the overall detector structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shield is constructed using composite dielectric materials that simultaneously provide optical/infrared opacity and electrical insulation properties. These composite materials allow the shield to perform multiple functions (radiation blocking and electrical isolation) while maintaining structural integrity and minimizing complexity.

Inventive Principle:

Principle #40Composite materials

2Reliability

If a shield is added to block optical and infrared radiation, then background noise and arcing are reduced, but the device complexity increases

Engineering Contradiction:

Improvedetection accuracyVSAvoiddetector structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The dielectric shield is designed to perform multiple functions simultaneously: blocking optical and infrared radiation, providing electrical insulation to prevent arcing, and maintaining structural support. By making the shield multi-functional, the design avoids adding separate components for each function, thereby minimizing the increase in device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The shield's material properties are carefully selected and optimized to achieve the desired balance between radiation blocking capability and electrical insulation. By adjusting parameters such as material composition, thickness, and dielectric strength, the shield effectively reduces background noise and arcing while keeping the overall structure relatively simple.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the detector shield blocks all radiation, then background noise is minimized, but X-ray detection sensitivity is reduced

Engineering Contradiction:

Improvebackground noise reductionVSAvoidX-ray detection sensitivity

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The shield is designed with different properties for different regions: it is opaque to optical and infrared radiation but transparent to X-rays. This local differentiation of radiation blocking characteristics allows the shield to reduce background noise from optical/infrared sources while maintaining high sensitivity for X-ray detection.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The dielectric material of the shield is specifically selected to have different attenuation characteristics for different radiation types. The material parameters (such as atomic number, density, and thickness) are optimized to allow X-rays to pass through while blocking optical and infrared radiation, thereby achieving selective radiation filtering that maintains detection sensitivity.

Inventive Principle:

Principle #35Parameter changes

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 effectively minimizes background noise and prevents arcing, enhancing the accuracy and reliability of X-ray detection in CT imaging systems by blocking unwanted radiation while allowing X-rays to pass through, thus improving image reconstruction quality.

Implementation Method 1

an optically opaque, infrared radiation opaque, and electrically insulating dielectric detector shield

Methodology Applied

Scientific EffectOptical absorption: Absorption (EM radiation)

Implementation Method 2

X-ray transparent, dielectric detector shield covering the detection surface

Methodology Applied

Scientific EffectX-ray transmission: X-Ray

Implementation Method 3

electrically insulating dielectric detector shield

Methodology Applied

Scientific EffectElectrical insulation: Dielectric

Data Source

PatentUS11474050B2Radiation detector module with insulating shield

Publication Date: 2022.10.18 REDLEN TECH

AI summary

A radiation detector module includes a frame, a module circuit board connected to the frame, detector units that each include radiation sensors disposed above the frame and electrically connected to the module circuit board, and an optically and infrared radiation opaque, X-ray transparent, electrically insulating detector shield covering a top surface and at least one side surface of the radiation sensors.