X-ray detector positioning mechanism for C-arm imaging
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Solution Overview
Problem
Conventional X-ray imaging apparatuses with C-shaped arms face challenges in maintaining optimal X-ray detector placement relative to subjects, leading to increased X-ray attenuation and decreased image contrast due to excessive distance, and require manual operator effort to adjust detector positions, increasing operator burden.
Innovation Solution
An X-ray imaging apparatus equipped with an arm driving mechanism, X-ray detector moving mechanism, and a control unit that adjusts the X-ray detector's position based on a subject model to maintain a predetermined distance, reducing operator burden and minimizing X-ray attenuation by automatically positioning the detector according to the subject's shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the X-ray detector is moved closer to the subject by manually adjusting its position, then the distance between the subject and the X-ray detector is reduced, but the operator burden increases
Solution Approach 1:
The system automatically adjusts the X-ray detector position based on subject shape detection and predetermined distance settings, eliminating the need for manual operator intervention. The apparatus serves itself by autonomously optimizing the detector-subject distance to maintain image contrast while reducing operator burden.
Solution Approach 2:
The system detects the subject's shape and continuously monitors the distance between the X-ray detector and the subject, using this feedback information to automatically adjust the detector position. This closed-loop control ensures optimal imaging conditions are maintained without manual intervention.
2Adaptability or versatility
If the distance between the subject and the X-ray detector is increased to accommodate different subject shapes, then the adaptability improves, but the X-ray attenuation increases and image contrast decreases
Solution Approach 1:
The system dynamically adjusts the X-ray detector position based on the detected subject shape and predetermined distance parameters. This dynamic positioning allows the system to adapt to different subject shapes while maintaining optimal imaging distance, thereby preserving image contrast across various imaging scenarios.
Solution Approach 2:
The system changes the positional parameters of the X-ray detector based on subject shape detection and predetermined distance settings. By adjusting these parameters automatically, the system maintains optimal imaging conditions for different subject shapes without increasing X-ray attenuation.
3Measurement precision
If the irradiation dose of X-rays is increased to suppress the decrease in image contrast, then the image contrast is improved, but the scattered X-rays increase and image quality deteriorates
Solution Approach 1:
The system performs preliminary detection of the subject's shape and calculates the optimal X-ray detector position before imaging begins. By pre-positioning the detector at the predetermined distance from the subject, the system prevents X-ray attenuation issues from arising, eliminating the need to increase irradiation dose and thereby avoiding increased scattered X-rays.
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
The solution effectively maintains optimal X-ray detector placement, reducing X-ray attenuation and maintaining image contrast while minimizing operator effort by automatically adjusting the detector's position based on the subject's shape, thus improving image quality and operational efficiency.
Implementation Method 1
the distance from the X-ray source to the X-ray detector becomes greater than the predetermined distance, thereby increasing the attenuation of the dose of X-rays
Data Source
AI summary
This X-ray imaging apparatus includes an X-ray source, an X-ray detector, an arm, an arm driving mechanism, an X-ray detector moving mechanism, a bed, and a control unit. The control unit performs control of a position adjustment operation for adjusting a position of the X-ray detector such that a distance from a surface of a subject model serving as a model of a surface shape of the subject to the X-ray detector becomes a predetermined distance by moving the X-ray detector toward or away from the surface of the subject model.