X-ray slit diaphragm scatter reduction
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Solution Overview
Problem
Current x-ray imaging techniques face challenges with scattered radiation, which degrades image quality and requires complex and power-intensive slot-scan methods with dual slit diaphragms, leading to mechanical complexity and increased x-ray tube loading.
Innovation Solution
A simplified slot-scan technique is implemented by moving a single slit diaphragm in front of the object and using a thresholding method to filter out scattered radiation, eliminating the need for a second slit diaphragm and optimizing radiation source usage, allowing for improved image quality with reduced mechanical complexity and power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dual slit diaphragm slot-scan technique is used to reduce scattered radiation, then scattered radiation is reduced and image quality is improved, but device complexity and mechanical coordination requirements increase significantly
Solution Approach 1:
The patent removes the second slit diaphragm from the dual-slit configuration, extracting only the essential first slit diaphragm needed for scatter reduction. This simplification eliminates the complex mechanical coordination required for two moving diaphragms while maintaining the core functionality of reducing scattered radiation through the first diaphragm's collimation effect.
Solution Approach 2:
The patent replaces the mechanical coordination system for two moving slit diaphragms with an electronic/image processing system. By using a single stationary or简单地 moving first slit diaphragm combined with advanced image reconstruction algorithms, the system substitutes complex mechanical synchronization with simpler mechanical movement and computational processing.
2Object-affected harmful factors
If a dual slit diaphragm slot-scan technique is used to reduce scattered radiation, then scattered radiation is reduced, but the x-ray tube assembly is severely loaded requiring more power
Solution Approach 1:
By removing the second slit diaphragm, the patent eliminates the need for the high-power demands associated with coordinating two moving diaphragms and their associated motors, control systems, and mechanical components. The single diaphragm configuration reduces the overall power requirements of the x-ray system while maintaining scatter reduction effectiveness.
3Device complexity
If a single slit diaphragm is used instead of dual slit diaphragms, then device complexity is reduced, but scattered radiation reduction effectiveness may be compromised
Solution Approach 1:
The patent introduces image processing algorithms and computational methods as intermediaries to compensate for the reduced physical scatter reduction capability of a single slit diaphragm. These computational tools process the detected radiation patterns to enhance image quality and reduce the impact of scattered radiation, effectively making up for the simplified mechanical configuration.
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 significantly reduces scattered radiation, enhances image quality, and simplifies the x-ray system design, reducing component requirements, costs, and mechanical vulnerability while maintaining reliability and ease of use, without the need for a more powerful x-ray source.
Implementation Method 1
X-ray radiation is emitted in a radial direction from the x-ray source
Implementation Method 2
scattered radiation (e.g., that arising in the object to be x-rayed, which otherwise impinges in an undirected manner on the detector)
Data Source
AI summary
The invention relates to a method (62, 64) for creating x-ray images as well as to an x-ray system. During the creation of an x-ray image, a slit diaphragm (16) is moved in front of an object (24) to be x-rayed, along a path extending between a radiation source (10) and said object (24), in order for the object (24) to be scanned. X-rays emitted by the radiation source (10) are detected by a detector (20) upon penetration of the slit diaphragm (16) and the object (24) to be x-rayed. In order to create an x-ray image using a simplified slot scanning technique, the x-ray image is created without the need for a second slit diaphragm (16) between the object (24) to be x-rayed and the detector (20), and only the radiation of which the intensity (60), detected by the detector (20) during the scan, exceeds a predefined threshold value is processed.