Radiation CT Source and Panel Positioning for ROI Magnification
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Solution Overview
Problem
Radiation CT apparatuses face challenges in accurately setting imaging positions and adjusting magnification rates, particularly for large breasts or small regions of interest, leading to incomplete or poorly detailed images.
Innovation Solution
Incorporating a radiation source and detecting panel that are movable relative to each other, with region of interest information obtaining and position calculating means to adjust the imaging positions and magnification rates, ensuring accurate imaging of specific regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radiation source and detecting panel are fixed in position, then the device complexity is reduced, but the imaging position accuracy and magnification rate adjustment capability deteriorate
Solution Approach 1:
The patent applies the dynamics principle by making the radiation source and detecting panel movable relative to each other along the z-axis. This allows dynamic adjustment of the imaging magnification rate and positioning accuracy, resolving the contradiction between fixed simplicity and dynamic precision requirements.
Solution Approach 2:
The patent changes the positional parameters of the radiation source and detecting panel to adjust imaging characteristics. By varying the z-position of these components, the system achieves different magnification rates and imaging positions, enabling accurate imaging of regions of interest while maintaining manageable device complexity through parameter adjustment rather than structural complexity.
2Measurement precision
If the imaging magnification rate is increased to observe small regions in detail, then the measurement precision of small regions improves, but the imaging area covered deteriorates
Solution Approach 1:
The system dynamically adjusts the imaging magnification rate by moving the radiation source and detecting panel to different z-positions. This allows the operator to switch between high magnification for detailed observation of small regions and low magnification for comprehensive coverage of large areas, resolving the contradiction between detailed detection and area coverage.
Solution Approach 2:
The patent enables segmentation of the imaging process into multiple steps with different magnification rates. The system can first perform a survey scan at low magnification to identify regions of interest, then perform detailed scanning at high magnification only for those specific regions, effectively segmenting the imaging task to achieve both comprehensive coverage and detailed detection.
3Manufacturing precision
If the imaging position is not accurately set, then the ease of operation is improved, but the image quality and completeness deteriorate
Solution Approach 1:
The patent implements feedback by displaying radiation images in real-time during the imaging process. The operator can observe the image quality and completeness on the display and adjust the radiation source and detecting panel positions accordingly, creating a feedback loop that ensures accurate imaging while maintaining ease of operation through active guidance.
Solution Approach 2:
The system enables self-service imaging by allowing the operator to independently adjust the imaging parameters and position the radiation source and detecting panel based on real-time image feedback. This self-service capability eliminates the need for complex automated positioning systems while ensuring accurate and complete imaging through operator expertise and real-time observation.
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
Enables precise imaging of entire regions of interest with optimal magnification, minimizing radiation dosage and improving image quality by accurately positioning the radiation source and detecting panel.
Implementation Method 1
a radiation source that emits radiation in a conical manner
Implementation Method 2
a detecting panel for detecting the radiation
Data Source
AI summary
A region of interest information obtaining section obtains the size and position of a region of interest within a radiation image of a subject. A position calculating section calculates positions for a radiation source and a detecting panel that enable appropriate radiation imaging of the region of interest, employing the region of interest information. A moving section moves the radiation source and the detecting panel to the positions calculated by the position calculating section. Radiation images of the subject are obtained while rotating the radiation source and the detecting panel about a rotating axis that passes through a predetermined position at which the subject is placed.