Ionization Chamber Detection Region Alignment in X-Ray Imaging
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Solution Overview
Problem
Operators struggle to accurately adjust the detection region of an ionization chamber due to the lack of position identification or obstruction by the human body, affecting image quality and exposure control in X-ray imaging.
Innovation Solution
A method and device for determining the target detection region of an ionization chamber using image recognition to identify human body feature points, construct a spatial model, and adjust the ionization chamber's position and detection region based on these points, ensuring accurate alignment with the target region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If position identification of the detection region is not provided or is blocked by the human body, then the operator cannot accurately judge the detection region position, but adding position identification increases device complexity
Solution Approach 1:
The patent introduces an image collection device as an intermediary to capture images of the to-be-scanned object and its target region. This intermediary enables indirect observation and measurement of the target region position without requiring direct physical markers or additional complex positioning hardware on the ionization chamber itself.
Solution Approach 2:
The patent replaces traditional mechanical positioning systems with image processing and spatial coordinate transformation. Instead of using physical markers, mechanical alignment tools, or complex mechanical positioning mechanisms, the system uses digital image capture, feature point identification, and coordinate system transformations to achieve precise positioning.
2Productivity
If the operator manually adjusts the detection region position, then the adjustment process is time-consuming and inefficient, but automated adjustment increases device complexity
Solution Approach 1:
The system performs self-positioning by automatically capturing images, identifying target region features, calculating spatial coordinates, and determining the optimal detection region position without requiring manual intervention. The ionization chamber positioning is automated through software-based image processing and coordinate transformation algorithms.
Solution Approach 2:
The system establishes a feedback loop where the image collection device continuously monitors the target region, the processing unit analyzes the images to determine position accuracy, and the system automatically adjusts the detection region positioning based on the analysis results. This closed-loop feedback mechanism enables automated refinement of the positioning.
3Reliability
If the detection region is not accurately positioned within the target region, then image quality deteriorates and exposure control is poor, but implementing automated positioning increases device complexity
Solution Approach 1:
The patent replaces complex mechanical positioning and alignment systems with digital image processing and computational geometry. The reliability of positioning is achieved through software-based coordinate transformation and feature matching rather than through additional mechanical components or sensors.
Solution Approach 2:
The image collection device serves multiple functions: it captures images for documentation, identifies target region features for positioning, and provides spatial reference information for coordinate transformation. This multi-functionality reduces the need for separate specialized devices while maintaining positioning reliability.
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
Enhances determination efficiency and accuracy, ensuring better imaging positions and quality by automatically aligning the ionization chamber's detection region with the target region, improving user experience and image quality.
Implementation Method 1
the dose of radiation passing through the target region of the scanned object is usually detected by using a gaseous/solid ionization chamber
Data Source
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AI summary
A method and a device for determining a target detection region of an ionization chamber, and storage medium. The method includes obtaining an image comprising a target region of a to-be-scanned object acquired by an image collector; identifying the target region based on the image; obtaining a first position of the ionization chamber in a spatial coordinate system; obtaining a selectable detection region of the ionization chamber based on the first position; determining the target detection region of the ionization chamber according to the target region and the selectable detection region, so that the target detection region is within the target region.