C-Arm X-Ray Apparatus Positioning for Vessel Imaging
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Solution Overview
Problem
Existing X-ray diagnostic apparatuses face challenges in performing various types of imaging, such as 3D imaging and imaging of obliquely traveling blood vessels, due to limited positional flexibility and vibration issues during X-ray exposure.
Innovation Solution
The apparatus employs a C-shaped arm mechanism with a rotating and sliding structure, allowing the X-ray tube and detector to be positioned arbitrarily, including inclining the C-shaped arm main rotating shaft to align with the direction of obliquely traveling blood vessels, and using a control system to manage the movement of arms in independent or interlocking modes to minimize vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a C-shaped arm mechanism with rotating and sliding structure is used to enable flexible positioning for various imaging angles, then imaging versatility is improved, but device complexity increases
Solution Approach 1:
The C-shaped arm mechanism is divided into multiple independent components: a first arm rotatable about a first rotating axis, a second arm rotatable about a second rotating axis, and a holding structure connecting them. Each component can move independently, allowing flexible positioning for various imaging angles while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The mechanism employs dynamic positioning capabilities with multiple rotating shafts and sliding structures. The first arm can rotate about the first rotating axis, the second arm can rotate about the second rotating axis, and both arms can slide along arc-like paths. This dynamic configuration enables the system to adapt to different imaging requirements without requiring a completely different apparatus for each imaging type.
2Measurement precision
If multiple rotating shafts and sliding structures are used to achieve arbitrary positioning, then positioning precision is improved, but vibration during X-ray exposure increases
Solution Approach 1:
The control system performs preliminary positioning of the first and second arms to desired angles before initiating X-ray exposure. The arms are moved to their target positions and held stationary during the exposure period, ensuring that no movement-induced vibration occurs during image capture. This separates the positioning action from the imaging action in time.
Solution Approach 2:
The control system manages the movement and positioning of the arms with precision, likely using feedback mechanisms to ensure accurate positioning while minimizing unnecessary movements. By precisely controlling the positioning process and maintaining stability during exposure, the system achieves high positioning precision without introducing harmful vibrations during X-ray capture.
3Ease of operation
If the first arm slides along an arc-like slide axis and the second arm slides along another arc-like slide axis, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
Both the first and second arms slide along arc-like (curved) slide axes rather than straight linear paths. This curved geometry naturally guides the arms through their rotation ranges, making operation smoother and more intuitive. The arc-like paths accommodate the rotational motion of the arms while maintaining consistent spacing from the rotating axes, easing the operational complexity despite the curved trajectories.
Data Source
AI summary
According to one embodiment, an X-ray diagnostic apparatus includes a first arm, a second arm, a holding structure, an X-ray tube and an X-ray detector. The first arm rotates by a first rotating shaft and slides along a first arc-like slide axis relatively to the first rotating shaft. The second arm rotates by a second rotating shaft and slides along a second arc-like slide axis relatively to the second rotating shaft. The holding structure is connected with a first arm side and configured to hold the second arm. The X-ray tube and the X-ray detector are installed on the second arm.