X-Ray Detector Line-Sensor Segmentation for Resolution and Sensitivity
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Solution Overview
Problem
Existing X-ray detectors using X-ray line sensors face challenges in achieving both high resolution and high detection sensitivity due to fixed pixel sizes, requiring repetitive rescanning or changing scanning rates, which leads to inefficiencies.
Innovation Solution
The X-ray image capture system employs a configuration with multiple X-ray line sensors arranged back-to-back or front-to-front, a collimator to manage scattered rays, and a driving control mechanism that adjusts the detector's tilt and rotation to match X-ray emission and introduction directions, along with temperature compensation and pulsed X-ray sources for improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a small pixel size is used in the X-ray line sensor, then the resolution of the X-ray transmission image is improved, but the detection sensitivity deteriorates
Solution Approach 1:
The X-ray detector is divided into multiple X-ray line sensors, each with different pixel sizes. This segmentation allows the system to use smaller pixels for high-resolution imaging when needed, while larger pixels provide high detection sensitivity for low-transmission scenarios, resolving the contradiction between resolution and sensitivity.
Solution Approach 2:
Different regions of the detector have different pixel sizes optimized for different functions. Small pixels are used in regions requiring high resolution, while large pixels are used in regions requiring high sensitivity. This local differentiation allows each pixel group to perform its specialized function optimally.
2Reliability
If a large pixel size is used in the X-ray line sensor, then the detection sensitivity of the X-ray transmission image is improved, but the resolution deteriorates
Solution Approach 1:
The detector is segmented into multiple line sensors with different pixel sizes. Large pixels in certain line sensors provide high detection sensitivity for detecting weak X-ray signals, while other line sensors with smaller pixels maintain resolution capabilities, thus resolving the contradiction.
Solution Approach 2:
Large pixel sizes are implemented in specific local regions of the detector where high sensitivity is prioritized, while other regions maintain smaller pixels for resolution. This local quality differentiation allows the system to optimize for sensitivity where needed without compromising overall resolution.
3Measurement precision
If replacement with an X-ray line sensor with a different pixel size and rescanning is executed, then the desired image quality is achieved, but duplication of efforts is caused
Solution Approach 1:
The detector is segmented into multiple line sensors with different pixel sizes, allowing the system to capture both high-resolution and high-sensitivity data in a single scan. This eliminates the need for rescanning with different sensors, thereby maintaining image quality while improving inspection efficiency.
Solution Approach 2:
The detector system is designed to be multi-functional by incorporating multiple line sensors with different pixel sizes. This universal detector can handle both high-resolution imaging and high-sensitivity detection in a single operation, eliminating the need for multiple separate scanning operations.
4Measurement precision
If scanning at a changed scanning rate is executed, then the desired image quality is achieved, but duplication of efforts is caused
Solution Approach 1:
The detector is segmented into multiple line sensors with different pixel sizes, enabling the system to obtain both high-resolution and high-sensitivity images in a single scan at a constant scanning rate. This eliminates the need for multiple scans at different rates, thereby maintaining image quality while improving inspection efficiency.
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 system enables the acquisition of X-ray transmission images with desired resolution and sensitivity without repetitive rescanning, while maintaining image quality under temperature variations.
Implementation Method 1
an X-ray source that emits an X-ray(s), a detector that detects an X-ray(s) that transmit(s) through an image capture target subject body
Implementation Method 2
a collimator that is provided on end parts of the plurality of X-ray line sensors that face the X-ray source
Data Source
AI summary
An X-ray image capture system includes an X-ray source, an X-ray detector that includes a plurality of X-ray line sensors where respective X-ray detection elements are arranged in a one-dimensional manner with respect to a horizontal direction and respective X-ray detection element groups are arranged to be back-to-back or front-to-front and a collimator that is provided on end parts of the plurality of X-ray line sensors that face the X-ray source, a signal processing circuit that processes a measurement signal that is measured by the X-ray detector to produce an X-ray transmission image, and a driving control mechanism that moves the X-ray detector in upward and downward directions and rotates the X-ray detector around an axis in pixel pitch directions of the X-ray line sensors in association with movement of the X-ray detector to tilt the X-ray detector with respect to a horizontal plane.