X-ray Detector Array Geometry for Crosstalk Reduction
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Solution Overview
Problem
Current safety inspection apparatuses using x-ray radioscopy for detecting concealed articles within the human body face challenges in image quality due to the arrangement of detector modules, which affects the volume and effectiveness of the inspection process.
Innovation Solution
The apparatus features a sectorial ray beam emitted by an x-ray source with detector modules arranged along specific straight line segments, including a first and two second segments extending towards the x-ray source, ensuring that the normal to each detector module's surface passes through the focal spot, optimizing the arrangement to improve image quality and reduce crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detector modules are arranged in a conventional linear array, then the structure is simple, but image quality deteriorates due to ray crosstalk between modules
Solution Approach 1:
The detector array is divided into multiple independent detector modules, each with its own collimator and positioning mechanism. This segmentation allows each module to independently detect rays from specific angles, eliminating crosstalk while maintaining structural manageability through modular design
Solution Approach 2:
The detector modules are arranged in a two-dimensional configuration rather than a simple linear array. The modules are positioned at different heights and horizontal positions, creating a multi-dimensional detection geometry that improves image quality while distributing the complexity across multiple spatial dimensions
2Reliability
If detector module height is increased to ensure all rays are received, then detection completeness improves, but device volume increases
Solution Approach 1:
The detector modules are designed with adjustable positioning mechanisms that allow dynamic adjustment of their positions and orientations. This enables the system to adaptively track and receive rays from different angles without requiring a fixed large-height structure, reducing overall apparatus volume while maintaining detection completeness
Solution Approach 2:
Instead of increasing detector height in a single dimension, the solution distributes detection capability across multiple dimensions by arranging modules at different heights and horizontal positions. This multi-dimensional arrangement achieves complete ray reception without requiring excessive height in any single dimension, controlling overall apparatus volume
3Volume of stationary object
If detector modules are positioned closer to reduce apparatus size, then compactness improves, but measurement precision deteriorates due to increased crosstalk
Solution Approach 1:
Each detector module is equipped with its own collimator that segments and directs rays from specific angular ranges. This segmentation allows modules to be positioned closer together while maintaining precise angular discrimination, preventing crosstalk even at reduced spacing and enabling compact apparatus design
Solution Approach 2:
Each detector module is designed with localized optimization features including individual collimators and positioning mechanisms tailored to its specific location in the array. This local quality optimization ensures that each module maintains high measurement precision for its designated angular range, even when modules are densely packed to reduce overall apparatus volume
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 configuration enhances image clarity, particularly for the abdomen region, allows for a reduced detector module height, and improves the overall inspection effect by ensuring all rays are received without passing between modules, thereby enhancing the inspection quality.
Implementation Method 1
an x-ray source comprising a ray emission focal spot and configured to emit a sectorial ray beam from the ray emission focal spot
Implementation Method 2
a plurality of detector modules each of which has a ray receiving surface, and which are arranged along a plurality of straight line segments
Data Source
AI summary
A safety inspection apparatus is disclosed in embodiments of the present invention. The safety inspection apparatus includes: an x-ray source including a ray emission focal spot; and a plurality of detector modules each of which has a ray receiving surface, and which are arranged along a plurality of straight line segments. The plurality of straight line segments include a first straight line segment and two second straight line segments, and, the two second straight line segments extend from the two ends of the first straight line segment towards the x-ray source side, respectively. In a plane where the sectorial ray beam is located, a normal to the ray receiving surface of each of the detector modules at a midpoint of the ray receiving surface of the each of the detector modules passes generally through the ray emission focal spot of the x-ray source.