Surgical Registration Device Pose Determination via Optical and Depth Tracking
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Solution Overview
Problem
Current surgical registration devices used in surgical navigation systems have low accuracy in determining the pose of surgical registration devices due to their design, which affects the precision of relative spatial relationships between tracking systems and sensor devices, leading to low tracking accuracy.
Innovation Solution
A method and device that utilize optical patterns and depth information to determine the pose of a surgical registration device by obtaining images, detecting optical patterns, and using surface model data and depth information to calculate precise positions and orientations, incorporating both optical and depth-based tracking for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If consumer-grade sensor devices are used for tracking, then device complexity is reduced and ease of operation is improved, but measurement precision and tracking accuracy deteriorate
Solution Approach 1:
The patent combines multiple tracking technologies (optical tracking using camera systems and electromagnetic tracking using field-based sensors) into a single surgical registration device. This hybrid approach allows the system to leverage the advantages of both tracking methods while compensating for their individual limitations, thereby improving overall measurement precision without sacrificing ease of operation
Solution Approach 2:
The surgical registration device is designed to be detectable by both optical tracking systems and electromagnetic tracking systems simultaneously. This multi-functionality allows the same device to work across different tracking modalities, enabling flexible use in various surgical scenarios while maintaining high accuracy through the ability to switch between or combine tracking methods
2Device complexity
If a single tracking system is used, then device complexity is reduced, but measurement precision and reliability of spatial relationships deteriorate
Solution Approach 1:
The patent integrates both optical and electromagnetic tracking capabilities into a unified surgical registration device. By merging these two tracking systems, the device achieves higher measurement precision and more reliable spatial relationship determination compared to using a single tracking system, while the integration is managed through a coordinated control mechanism that reduces overall system complexity
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
The method and device significantly improve the accuracy of pose determination and relative spatial relationships, enhancing the precision of surgical navigation systems by combining optical and depth-based tracking, leading to improved tracking accuracy and navigation during surgical procedures.
Implementation Method 1
at least one optical pattern arranged on the surface
Implementation Method 2
obtaining depth information describing three-dimensional coordinates of the surface
Data Source
AI summary
A method, a surgical registration device, a sensor device, a system, a computer program, a computer-readable medium and a data carrier signal are disclosed. The surgical registration device comprises a surface, an optical pattern on the surface, and an interface unit to attach to a tracking system. The method comprises obtaining an image of the surgical registration device, detecting the at least one optical pattern in the image, obtaining surface model data describing the surface, obtaining a location of the optical pattern with respect to the surface, determining, based on the detected optical pattern, the surface model data and the location of the optical pattern, a second pose of the surface, obtaining depth information describing three-dimensional coordinates of the surface and determining, based on the second pose, the surface model data and the depth information, a third pose of the surface of the surgical registration device.