Mobile X-ray Detector Positioning via External Markers
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Solution Overview
Problem
The challenge lies in efficiently aligning mobile x-ray detectors and emitters, especially when they have variable positioning requirements, as direct optical determination is often obstructed and measuring devices cannot be easily placed inside the detector housing, complicating the alignment process.
Innovation Solution
A positioning device with markers and sensors is used to determine the position and orientation of the x-ray detector, allowing for exact alignment without modifying the detector, using connection elements and optional wireless data transmission for automatic alignment of the x-ray emitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If direct optical determination of the x-ray detector pose is used, then alignment speed is improved, but measurement accuracy deteriorates because the detector must be arranged behind the patient causing obstruction
Solution Approach 1:
The patent introduces a positioning device with markers as an intermediary between the x-ray detector and the optical measurement system. The markers are arranged on the positioning device in a known geometric pattern, allowing the x-ray emitter to optically determine the position of the markers rather than directly determining the detector pose. This intermediary approach enables accurate pose calculation through mathematical transformation while maintaining fast optical measurement speeds.
2Measurement precision
If measuring devices are placed inside the detector housing, then direct pose measurement is improved, but device complexity increases due to restricted housing volume and structural modifications
Solution Approach 1:
The patent separates the measurement function from the detector housing by placing markers on an external positioning device rather than inside the detector. This segmentation allows the detector to remain structurally simple while the positioning device handles all measurement functions. The markers are arranged on the positioning device which can be independently adjusted and positioned without modifying the detector housing.
3Stability of the object's composition
If multiple connection elements are used to establish mechanical connection between positioning device and detector, then positioning stability is improved, but ease of operation deteriorates due to complex connection and disconnection procedures
Solution Approach 1:
The patent employs a dynamic connection system where multiple connection elements can be selectively engaged or disengaged. The connection elements are designed to allow quick attachment and detachment while maintaining stable positioning when connected. The system enables flexible operation where the positioning device can be rapidly connected to different detectors or repositioned while ensuring stable mechanical coupling during imaging procedures.
Data Source
AI summary
A positioning device for a mobile x-ray detector, an x-ray device containing such a mobile positioning device, and a method mutually align a mobile x-ray detector and an x-ray emitter in relation to one another. In order to enable exact mutual alignment or positioning of the mobile x-ray detector in relation to the x-ray emitter, a positioning device is used for a mobile x-ray detector. The positioning device contains at least one marker and/or at least one sensor for determining the position and/or the orientation of the positioning device and contains a number of connection elements for establishing a mechanical connection between the positioning device and the mobile x-ray detector.