Gantry Support Stabilization for Mobile C-Arm Imaging Systems
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Solution Overview
Problem
Mobile 3D C-arm imaging systems face challenges in positional accuracy and image quality due to mechanical variation and non-repeatable motion, which are exacerbated by increased weight and flexibility, leading to blurring and oscillations in both 2D and 3D imaging.
Innovation Solution
The implementation of a gantry support system with additional contact points, such as rollers and truck assemblies, to stabilize the gantry member along its path of movement, reducing flex and oscillation, and incorporating dampening devices to enhance stability and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mobile C-arm configuration is used to provide positioning flexibility and maneuverability, then ease of operation is improved, but mechanical variation and non-repeatable motion increase, worsening measurement precision
Solution Approach 1:
A laser pointer assembly is introduced as an intermediary between the imaging assembly and the surgical site. The laser pointer is rigidly coupled to the imaging assembly and projects a laser indicator that serves as a visual reference for positioning. This intermediary allows the mobile C-arm to maintain flexibility while providing a stable reference system for accurate positioning, as the laser indicator can be precisely aligned with anatomical landmarks or surgical targets.
2Adaptability or versatility
If the O-shaped gantry is used to increase 3D scan range, then adaptability is improved, but system weight increases, worsening ease of operation
Solution Approach 1:
The laser pointer assembly is extracted as a separate, modular component from the main O-shaped gantry structure. It is attached to the imaging assembly rather than being integrated into the heavy gantry framework. This allows the laser positioning system to be used with lighter C-arm configurations while maintaining the enhanced 3D scanning capabilities of the O-shaped design when needed.
3Adaptability or versatility
If motorized parts and articulated joints are added to increase positioning flexibility, then adaptability is improved, but mechanical interfaces become looser, worsening manufacturing precision
Solution Approach 1:
The laser pointer assembly provides a visual reference system that reduces dependence on precise mechanical interfaces. By using optical indicators (laser lines and pointers) rather than relying solely on mechanical alignment features, the system can achieve accurate positioning even with the inherent play in motorized joints and articulated connections. The laser indicator serves as a software-like reference that compensates for mechanical imperfections.
Data Source
AI summary
Certain embodiments provide systems and methods for gantry support. Certain embodiments provide a mobile imaging system. The system includes a base and a gantry member moveably attached to the base. The gantry member includes an imaging source. The system also includes a gantry support positioned on the base for supporting the gantry member. The gantry support contacts the gantry member at one or more points in a range of motion for the gantry member. Certain embodiments provide a method for gantry member stabilization. The method includes providing a gantry support on a gantry base to provide support for an imaging system gantry member. The imaging system gantry member is attached to the gantry base. The method further includes positioning the gantry support with respect to the gantry member to support the gantry member along at least a portion of a path of movement of the gantry member.