Multi-Energy X-Ray Backscatter Imaging for Cargo Material Identification
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Solution Overview
Problem
Existing X-ray transmission methods struggle to detect organic materials concealed within metal-laden cargo containers due to overlapping signals from container walls, making it difficult to accurately identify and display the material type.
Innovation Solution
A method and apparatus using multi-energy X-ray backscattering to normalize container images by installing a phantom with preset location and material, generating a difference image, inferring similarity with target materials, and transmitting detection information to a display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If X-ray backscattering imaging is used to detect cargo in containers, then detection capability for surface materials is improved, but detection accuracy for organic materials is worsened due to signal mixing from metal container walls
Solution Approach 1:
The patent segments the detected signal into different energy components by using multi-energy X-ray backscattering. The system divides the backscattered radiation into multiple energy bands and processes each band separately, allowing differentiation between signals from container walls and signals from cargo materials based on their distinct energy signatures.
Solution Approach 2:
The patent changes the energy parameter of the X-ray radiation by using multiple energy levels. The system varies the X-ray energy and measures backscattering at each energy level, then uses the energy-dependent backscattering characteristics to identify material types and distinguish cargo from container wall signals.
2Object-affected harmful factors
If low-dose X-rays are used for security screening, then radiation safety is improved, but signal quality and detection sensitivity are worsened
Solution Approach 1:
The patent changes the energy parameter of the X-ray radiation by using multiple energy levels. The system varies the X-ray energy and measures backscattering at each energy level, then uses the energy-dependent backscattering characteristics to identify material types and distinguish cargo from container wall signals.
3Adaptability or versatility
If multi-energy X-ray backscattering is used to identify material types, then material identification capability is improved, but system complexity is worsened
Solution Approach 1:
The patent implements a universal detection system that can identify multiple material types using a single multi-energy backscattering apparatus. The system processes different energy bands and applies pattern recognition algorithms to identify various materials including organics, metals, and other substances, making the system versatile for different screening scenarios without requiring multiple specialized devices.
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
Enhances the accuracy and speed of detecting various cargo types, including concealed items, by normalizing images and utilizing multi-energy backscattering characteristics to identify and display target materials within containers.
Implementation Method 1
X-ray backscattering imaging technologies have been widely studied and utilized in recent years because it is possible to obtain detection images generated in a way that directly reflects the surface of an object while being relatively easy to detect by collecting material distribution information
Data Source
AI summary
Proposed is an apparatus and method for identifying and displaying material types using multi-energy X-ray backscattering. Specifically, the method for identifying cargo includes a process of installing a phantom having a preset location and material, a process of performing photographing under a condition of orthogonal incidence on another side of the predefined container walls, a process of normalizing an entire image, a process of generating a difference image from the normalized multi-energy backscattering image, a process of inferring a similarity with a target material, a process of detecting a location and type of the target material in the entire image, and a process of transmitting information on the location and type of the target material to a display.