X-ray CT Gantry Frame Positioning for Tilt and Bending Trade-offs
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Solution Overview
Problem
Existing X-ray computed tomography apparatuses face limitations in reducing table top bending while maintaining operational range, as methods to minimize bending restrict tilt angles and interfere with the gantry and frame positioning, thereby not fully utilizing the apparatus's capabilities.
Innovation Solution
The X-ray computed tomography apparatus incorporates a gantry control circuitry that switches between a bending reduction mode and a tilt priority mode, allowing the upper frame to move closer to the gantry to reduce bending in a specific angle range and prioritizing tilt angles greater than this range, enabling optimal positioning and operation without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the frame is moved as close as possible to the gantry to reduce table top bending, then manufacturing precision of CT image is improved, but the operable range of tilt angles is restricted
Solution Approach 1:
The patent applies dynamics by making the frame position adjustable rather than fixed. The frame can be moved between a first position (closer to gantry) for reduced bending and a second position (farther from gantry) for increased tilt angle range. This dynamic repositioning allows the system to adapt to different operational requirements, resolving the contradiction between image precision and operational versatility.
2Ease of operation
If the tilt angle is restricted to avoid interference, then ease of operation is improved, but the capability of the X-ray computed tomography apparatus is not fully utilized
Solution Approach 1:
The system dynamically adjusts the frame position based on the required tilt angle. When large tilt angles are needed for full apparatus capability, the frame automatically moves to the second position to avoid interference. When smaller tilt angles suffice, the frame remains in the first position for simplified operation. This dynamic adaptation maintains ease of operation while enabling full apparatus capability utilization.
Data Source
AI summary
According to one embodiment, an X-ray computed tomography apparatus includes a gantry main body, a base, a first support frame, a second support frame and gantry control circuitry. The gantry control circuitry controls a tilt of the gantry main body, a movement of the table top by the first support frame, and a movement of the first support frame by the second support frame. The gantry control circuitry executes switching between a first tilt mode in which the gantry main body is tiltable in a first angle range and a second tilt mode in which the gantry main body is tiltable in a second angle range in which a tilt angle is greater than in the first angle range.