X-ray Filter Element with Transillumination Section
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Solution Overview
Problem
Existing x-ray devices face challenges in dynamically optimizing image quality while minimizing radiation dose, particularly when using filter elements that can lead to increased radiation exposure and image quality reduction due to dose control instabilities and overexposure during transillumination imaging.
Innovation Solution
A method that adapts radiation parameters based on image data from transillumination images, avoiding control oscillations by specifying parameters independently of interim images acquired during filter movement, and using a filter element with a transillumination section that allows x-radiation to pass unhindered, ensuring low radiation exposure and high image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dose control is performed based on image data from transillumination images, then image quality in the region of interest is improved, but radiation dose increases due to overexposure in the transillumination section
Solution Approach 1:
The filter element is designed with spatially varying properties: a filter section with high attenuation for regions adjacent to the region of interest, and a transillumination section with low attenuation for the region of interest itself. This local differentiation allows the system to maintain high image quality in the region of interest while reducing overall radiation dose by preventing overexposure in the transillumination section.
Solution Approach 2:
The filter element is divided into distinct functional sections: a filter section and a transillumination section. This segmentation allows independent optimization of each section's transmission characteristics, enabling the filter section to attenuate radiation in adjacent regions while the transillumination section allows radiation to pass through to the region of interest, thereby solving the contradiction between image quality and radiation dose.
2Adaptability or versatility
If the filter element is moved to displace the transillumination region, then the region of interest can be dynamically selected, but control oscillations occur due to different transmission behaviors of filter material versus examination object
Solution Approach 1:
The transillumination section acts as an intermediary element between the filter section and the examination object. It provides a transition zone that smooths the transmission characteristics, reducing the abrupt changes in radiation intensity that cause control oscillations when the filter element is moved. This intermediary section allows for stable dose control while maintaining the ability to dynamically select regions of interest.
3Loss of information
If filter material is used to attenuate radiation in adjacent regions, then surrounding context is provided for the region of interest, but image quality is reduced in the filter section area
Solution Approach 1:
The filter element implements local quality differentiation by creating distinct zones: the filter section provides attenuation and surrounding context information for regions adjacent to the region of interest, while the transillumination section maintains high radiation transmission to preserve image quality in the region of interest. This local optimization allows the system to maintain both contextual information and high image quality where needed.
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 achieves dynamic optimization of image quality with reduced radiation dose and minimizes unnecessary exposure, maintaining high image quality for transillumination regions while avoiding dose control instabilities and overexposure.
Implementation Method 1
the x-radiation that passes through the filter section is attenuated more than the x-radiation that passes through the transillumination section
Data Source
AI summary
The embodiments relate to a method for adapting at least one radiation parameter of a beam source in an x-ray device, wherein the beam source is activated according to the radiation parameter for providing x-radiation, wherein, as long as the filter element is not being moved, the radiation parameter is specified based on image data acquired in a transillumination region by the beam detector, wherein at least one interim image is recorded at least partially within a movement interval during which the filter element is moved, after which the radiation parameter is specified independently of the image data of the interim image or after which exclusively image data of the interim image that are acquired in an overlapping region of the beam detector that lies within the transillumination region during the entire recording interval are taken into account in the determination of the radiation parameter.