Buffer Zone Engine for Surgical Alignment Guidance
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Solution Overview
Problem
Conventional surgical navigation systems in 2D and 3D environments are limited in providing effective alignment guidance for surgeons, requiring manual judgment and multiple views to plan procedures accurately.
Innovation Solution
The Buffer Zone Engine detects changes in instrument angular distance and position within a unified 3D coordinate space, triggering visual cues in an augmented reality display to guide alignment with a virtual trajectory, defining a buffer zone within an alignment zone to indicate proper alignment and approaching misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional 2D and 3D surgical navigation systems are used, then surgical planning can be conducted based on medical images, but the systems lack real-time visual feedback and require manual judgment to determine alignment accuracy
Solution Approach 1:
The system implements real-time visual feedback by displaying a dynamic navigation guide that shows the instrument's alignment status with the virtual trajectory. The buffer zone visualization provides continuous feedback about alignment accuracy, eliminating the need for manual judgment and allowing surgeons to immediately see when the instrument is properly aligned or deviating from the target path.
Solution Approach 2:
The patent replaces manual visual assessment and mechanical alignment tools with an automated computer vision system that uses augmented reality to display alignment information. The system automatically calculates angular distance and determines buffer zone status, substituting the surgeon's manual judgment with automated optical and computational systems.
2Loss of time
If surgeons manually assess alignment using conventional navigation systems, then procedural planning can be performed, but time is lost due to the need to flip through multiple views and slices to determine proper alignment
Solution Approach 1:
The system performs preliminary computational actions by pre-calculating the virtual trajectory and establishing the buffer zone parameters before the surgical procedure begins. During surgery, the system only needs to display the pre-computed alignment information in real-time, eliminating the need for surgeons to manually analyze multiple image slices and perform repeated calculations during the procedure.
Solution Approach 2:
The patent replaces the manual process of flipping through multiple image views and slices with an automated augmented reality system that continuously displays the instrument's position relative to the virtual trajectory. The computer system automatically processes spatial coordinates and displays alignment status, substituting manual image navigation with automated real-time visualization.
3Reliability
If no visual buffer zone indication is provided, then the navigation system remains simple, but surgeons cannot easily determine when the instrument is approaching misalignment with the virtual trajectory
Solution Approach 1:
The system uses color changes in the augmented reality display to indicate buffer zone status. The dynamic navigation guide changes visual characteristics (such as color or intensity) to show when the instrument is within the buffer zone, approaching the boundary, or misaligned with the virtual trajectory. This provides intuitive visual cues that enhance reliability without significantly increasing system complexity.
Solution Approach 2:
The patent adds a visual dimension to alignment information by projecting the three-dimensional buffer zone concept into the augmented reality display. The system creates a virtual visualization layer that shows alignment status as a fourth dimension of information, allowing surgeons to perceive alignment accuracy without adding physical complexity to the surgical instruments or navigation hardware.
Data Source
AI summary
Various embodiments of an apparatus, methods, systems and computer program products described herein are directed to a Buffer Zone Engine renders a dynamic navigation guide virtual object (“dynamic navigation guide”). The Buffer Zone Engine detects changes in at least one of an instrument angular distance and an instrument position of a physical instrument in a unified three-dimensional (3D) coordinate space. The Buffer Zone Engine determines the detected change(s) corresponds to a threshold amount of difference away from a proper alignment of the physical instrument, the proper alignment representing alignment of the physical instrument with a virtual trajectory towards a target point. The Buffer Zone Engine triggers display of a first visual characteristic of the dynamic navigation guide in response to determining the detected change(s) corresponds to the threshold amount of difference away from the proper alignment.