Spiral CT with Synchronous X-Ray Arrays for Large-Object Inspection
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Solution Overview
Problem
Conventional multi-slice spiral CT devices are inadequate for inspecting large objects like air containers due to size constraints, requiring larger inspection spaces and complex structures, and face challenges in maintaining stability and penetration power.
Innovation Solution
A spiral CT device with a movable inspection station and multiple X-ray sources disposed on a rotational supporting apparatus, using fan-shaped beams with minimal overlap, combined with a processor for three-dimensional image reconstruction, and employing compressive sensing for overlapping data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional multi-slice spiral CT technology is used for large objects like air containers, then the detection area increases, but the system size and inspection space requirements increase significantly
Solution Approach 1:
The system divides the detection task into multiple energy levels by using dual-energy X-ray sources. The first X-ray source operates at a lower energy level (first energy range) and the second X-ray source operates at a higher energy level (second energy range). This segmentation allows the system to maintain a compact size while achieving comprehensive detection capability for large objects through multi-energy imaging rather than simply increasing physical dimensions.
2Area of stationary object
If fan angle is increased to cover larger inspection space, then detection coverage improves, but dosage inconsistency among fan-shaped X-ray beams worsens
Solution Approach 1:
The system changes the energy parameter of X-ray beams by using two different energy ranges. The first X-ray source produces beams in a first energy range with a first fan angle, while the second X-ray source produces beams in a second energy range with a second fan angle. This parameter change allows each source to operate within optimal dosage ranges, maintaining consistency while collectively covering a larger inspection space through multi-energy complementary imaging.
3Reliability
If X-ray source penetration power is increased for large objects, then detection capability improves, but system complexity and stability problems increase
Solution Approach 1:
The system segments the penetration task by using two X-ray sources with different energy levels rather than one high-power source. The first source handles lower energy penetration while the second source handles higher energy penetration. This segmentation reduces the burden on each individual source, simplifying their respective structures and improving stability while maintaining overall detection capability for large objects through combined multi-energy imaging.
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 efficient inspection of large objects with high quality and reduced system size, ensuring short inspection times and improved detection capabilities.
Implementation Method 1
a first plurality of X-ray sources (130-1, 130-2) disposed on the rotational supporting apparatus (120) and configured to provide fan-shaped X-ray beams
Implementation Method 2
a first plurality of X-ray receiving apparatuses (140-1, 140-2) corresponding to the plurality of X-ray sources (130) and configured to receive the X-rays
Data Source
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AI summary
The present disclosure provides a spiral Computed Tomography (CT) device and a three-dimensional image reconstruction method. The spiral CT device includes: an inspection station configured to carry an object to be inspected, the inspection station defining an inspection space which is located above the inspection station and is used for accommodating the object to be inspected; a rotational supporting apparatus which is disposed around the inspection space in a plane parallel to a first direction and is rotatable around the inspection space in a detection state; a plurality of X-ray sources located on the rotational supporting apparatus and configured to transmit X-rays to pass through the inspection space; and a plurality of X-ray receiving apparatuses in one-to-one correspondence to the plurality of X-ray sources, the plurality of X-ray receiving apparatuses being located on the rotational supporting apparatus opposite to the plurality of X-ray sources respectively and configured to collect the X-rays passing through the inspection space, wherein the plurality of X-ray sources and the plurality of X-ray receiving apparatuses are rotational synchronously with the rotational supporting apparatus.