Coded Markers for X-ray System Position Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing X-ray diagnostic imaging systems with marker arrangements on system components suffer from limited accuracy in position measurement due to a small number of detectable markers and unfavorable positioning of the position detection system.
Innovation Solution
A large number of coded 2D and/or 3D markers are distributed over the surface of X-ray diagnostic imaging system components, each with a reference point and associated code, allowing for precise correlation with predetermined locations, and using a position detection system to calculate positions and orientations based on a reference point network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a small number of markers are used in existing X-ray diagnostic imaging systems, then the device complexity is reduced, but the measurement precision of position detection deteriorates
Solution Approach 1:
The housing surface is segmented into multiple marker zones, each containing several coded markers. This segmentation allows the position detection system to detect multiple reference points simultaneously, improving position measurement accuracy through redundant measurements and better spatial distribution of detection points.
Solution Approach 2:
The patent transitions from traditional 1D or sparse 2D marker arrangements to a dense 2D grid pattern of coded markers on the housing surface. This dimensional expansion provides more reference points within the detection range, enhancing position and orientation determination accuracy through improved spatial sampling.
2Reliability
If markers are sparsely distributed on system components, then the manufacturing process is simplified, but the reliability of position detection deteriorates under unfavorable positioning conditions
Solution Approach 1:
Different regions of the housing surface are equipped with markers having locally optimized properties. The coded markers are strategically distributed to ensure that at least a sufficient number remain within the detection range under various positioning conditions, making the system reliable without requiring uniform dense coverage everywhere.
Solution Approach 2:
The marker distribution pattern is pre-designed and pre-positioned on the housing during manufacturing. This preliminary arrangement ensures that regardless of the subsequent positioning of the position detection system, a sufficient number of markers will be within detection range, guaranteeing reliable position detection without requiring real-time adjustment.
3Measurement precision
If only a few markers are within the angular detection range, then the device structure is simpler, but the accuracy of orientation determination deteriorates
Solution Approach 1:
The housing surface is divided into multiple marker zones with different orientations and positions. This segmentation ensures that when the device is oriented in different directions, at least some markers from different zones remain within the angular detection range, providing sufficient reference points for accurate orientation determination through multi-point geometric calculation.
Data Source
AI summary
Embodiments of an X-ray diagnostic imaging system comprise a plurality of coded 2D and/or 3D markers associated with surfaces of system components. The position and coding of at least some of the coded markers can be determined by a position detection system. In some embodiments, a coded marker is assigned a reference point having a known position on the surface of the system component. The positions of the system components in space can be calculated based at least in part on a reference point network determined from the position of the individual reference points measured with the position detection system. In some embodiments, the coded markers represent information with a data matrix code (DMC).