Vertical Radiographic Source Array for Artifact-Free Security Imaging
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Solution Overview
Problem
The linear scanning based imaging method for security inspection results in incomplete data in the cone angle direction of radiographic sources, leading to artifacts in the reconstructed images of objects being inspected.
Innovation Solution
A scanning imaging system where radiographic sources are arranged vertically and alternately emit ray beams to form a scanning area, with a conveying unit moving the object through the area, allowing linear detector arrays to capture first and second projection images, and a revolving unit ensuring comprehensive data collection by rotating the object, thereby eliminating artifacts in the reconstructed images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If linear scanning based imaging method is used with fixed radiographic sources, then device complexity is reduced, but data completeness in cone angle direction deteriorates leading to artifacts
Solution Approach 1:
The patent transitions from a single-plane linear scanning arrangement to a three-dimensional configuration where multiple radiographic sources are distributed along a vertical line. This dimensional extension enables data collection from multiple elevation angles simultaneously, completing the cone angle direction data without requiring complex rotational mechanics.
Solution Approach 2:
The imaging system is segmented into multiple independent radiographic sources arranged vertically, each contributing data from a specific angle. This segmentation allows the system to gather comprehensive conical data through parallel acquisition from multiple sources rather than sequential rotation, reducing mechanical complexity while improving data completeness.
2Measurement precision
If multiple radiographic sources are arranged vertically to collect complete cone angle data, then measurement precision is improved, but device complexity increases
Solution Approach 1:
Multiple radiographic sources are merged into a single vertical linear array structure, sharing common support infrastructure and detection resources. This combining approach achieves the measurement precision of multiple angled sources while avoiding the complexity of multiple independent scanning systems, as all sources operate within a unified linear scanning framework.
3Ease of operation
If radiographic sources are fixed at one side with linear scanning, then ease of operation is improved, but image quality deteriorates due to artifacts
Solution Approach 1:
The system adds a vertical dimension to the traditional linear scanning arrangement, creating a three-dimensional source distribution along a vertical line. This dimensional enhancement maintains the simplicity of linear scanning operation while eliminating cone artifacts by providing complete angular data coverage through the vertical arrangement of multiple sources.
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 provides complete data in the cone angle direction, enhancing the accuracy and consistency of the reconstructed images by eliminating artifacts and improving the quality of security inspection imaging.
Implementation Method 1
radiographic sources are fixed at one side of a scanning channel... the radiographic sources emit ray beams... linear detector arrays are arranged at the other side of the scanning channel for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object
Data Source
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AI summary
A scanning imaging system for security inspection of an object and an imaging method thereof are disclosed, the system comprising: a conveying unit (101) configured for bringing the object to move along a conveying direction; a plurality of radiographic sources (102) at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, configured for alternately emitting ray beams to form a scanning area; a linear detector array (103) at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.