Back-scattering Inspection System for Radioactive Substance Detection
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Solution Overview
Problem
Conventional X-ray back-scattering imaging technologies used for human body safety inspections lack the capability to detect radioactive substances, which are critical to identify in security screening processes.
Innovation Solution
A human body back-scattering inspection method and system that generates a modulated flying-spot ray beam, receives scattered rays, and calculates the average luminance value of background images to determine if a radioactive substance is present, using a combination of detector modules and image processing to distinguish body images from background images and identify potential radioactive material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional X-ray back-scattering imaging is used for human body inspection, then the inspection process is simple and fast, but the capability to detect radioactive substances is lacking
Solution Approach 1:
The patent makes the existing X-ray back-scattering inspection device perform multiple functions: both conventional body imaging and radioactive substance detection. By analyzing background image luminance characteristics and comparing them against threshold values, the system detects radioactive materials without requiring a separate detection device, thus achieving multi-functionality while maintaining relatively simple device architecture
Solution Approach 2:
The patent changes the analysis parameter from conventional body image structure to background image luminance characteristics. By calculating average luminance values of background regions and comparing them against predetermined thresholds, the system detects radioactive substances through parameter transformation rather than adding new hardware, resolving the contradiction between detection capability and device complexity
2Measurement precision
If a separate radioactive substance detection device is used, then detection accuracy is improved, but inspection efficiency is reduced due to additional hardware and time
Solution Approach 1:
The patent merges radioactive substance detection functionality into the existing X-ray back-scattering inspection system. By utilizing the same X-ray source and detector for both body imaging and radioactive detection, the system achieves accurate detection without requiring separate devices or additional inspection time, thus maintaining high inspection efficiency while improving detection accuracy
Solution Approach 2:
The inspection system performs dual functions simultaneously: conventional body scanning and radioactive substance detection. The background image analysis method enables the system to extract radioactive detection information from existing imaging data, eliminating the need for separate detection equipment and maintaining inspection flow efficiency
3Adaptability or versatility
If background image analysis is performed to detect radioactive substances, then detection capability is enhanced, but image processing complexity increases
Solution Approach 1:
The patent extracts the background image region from the complete scan image and performs analysis only on this extracted portion. By isolating and analyzing only the background luminance characteristics rather than processing the entire image, the system enhances detection capability while minimizing image processing complexity through selective region analysis
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 effective detection of radioactive substances during human body inspections, improving the efficiency of security screenings without requiring additional hardware, and allowing for the identification of specific body parts carrying such substances.
Implementation Method 1
a ray generator 1 for generating a ray beam
Implementation Method 2
a back-scattering detector 3 for receiving back-scattered rays and generating an electric signal
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A human body back-scattering inspection method and system are discloses. The method includes: obtaining a back-scattering scan image of a human body under inspection; distinguishing a body image from a background image in the back-scattering scan image; and calculating a feature parameter of the background image to determine whether radioactive substance is carried with the human body. With some embodiments of the present disclosure, it is possible to determine whether any radioactive substance is carried with a human body during back-scattering inspection of the human body. In further embodiments of the present disclosure, it is possible to approximately determine which part(s) of the human body carries the radioactive substance. This improves efficiency of inspection.