X-Ray CT Gantry and Mount Frame for Decubitus-Upright Imaging
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Solution Overview
Problem
Images obtained by decubitus and upright imaging in traditional X-ray CT apparatuses may not accurately represent the positional relationship of objects due to gantry rotation between imaging states.
Innovation Solution
The X-ray CT apparatus includes a gantry, support member, and mount frame that allow for a changeable relative positional relationship between the gantry and support member, enabling accurate imaging in both decubitus and upright positions by integrating the gantry and support member on a mount frame that can change posture between vertical and horizontal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the gantry body is rotated to transition between decubitus and upright imaging positions, then the imaging system can accommodate different patient positions, but the relative positional relationship between objects in images becomes inaccurate
Solution Approach 1:
The system is divided into independently controllable components: the gantry body rotation mechanism and the C-arm rotation mechanism. By segmenting the rotation functions, the system can adjust each component separately to maintain accurate positional relationships while transitioning between imaging positions.
Solution Approach 2:
The C-arm assembly acts as an intermediary mechanism between the gantry body and the imaging detector. By introducing this intermediate rotation joint, the system can compensate for positional deviations caused by gantry rotation, thereby maintaining accurate spatial relationships in the acquired images.
2Measurement precision
If the gantry body is fixed in position, then the relative positional relationship in images remains accurate, but the system cannot switch between decubitus and upright imaging states
Solution Approach 1:
The system employs dynamic rotation mechanisms with controllable degrees of freedom. The C-arm can rotate independently around the patient, and the gantry body can adjust its position, allowing the system to dynamically adapt to different imaging requirements while maintaining positional accuracy through coordinated control.
Solution Approach 2:
The imaging system is designed with multi-functional capabilities through the C-arm rotation mechanism, which enables the same imaging apparatus to perform both decubitus and upright imaging. This universal design allows one system to fulfill multiple imaging functions without sacrificing positional relationship accuracy.
3Ease of operation
If the C-arm rotates about the patient's body axis during state transition, then the imaging system can smoothly transition between positions, but additional control complexity is introduced
Solution Approach 1:
The control system incorporates feedback mechanisms that monitor the positions of the gantry body and C-arm during rotation. By continuously detecting the current state and comparing it with the target position, the system can automatically adjust rotation speeds and stop positions, simplifying operation while managing the inherent control complexity through intelligent algorithms.
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
Maintains accurate relative positional relationships between the gantry and support member during state transitions, ensuring precise imaging in both decubitus and upright positions.
Implementation Method 1
a gantry 10 including an imaging system to image a subject
Data Source
AI summary
An X-ray computed tomography apparatus includes a gantry, a support member, a mount frame, and a support stand. The gantry includes an imaging system to image a subject. The support member supports a support plate that supports the subject in imaging. The support member and the gantry are mounted on a mount frame such that a relative positional relationship between the support member and the gantry is changeable in a longitudinal direction of the support plate. The support stand supports the mount frame in a manner that the mount frame is changeable in posture at least in-between a vertical direction and a horizontal direction.