Alignment Guide Navigation for Precise Instrument Tracking
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Solution Overview
Problem
Existing navigation systems face challenges in accurately tracking and navigating instruments relative to a subject, particularly in procedures where direct visual access is obstructed, such as surgical or assembly procedures, due to limitations in current electromagnetic and optical tracking technologies.
Innovation Solution
A navigation system incorporating an alignment guide that includes a movable and adjustable base system, fixed to the subject, allowing precise alignment and tracking of instruments using electromagnetic and optical tracking devices, with a robotic system for automated positioning and mechanical fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If electromagnetic tracking systems are used to track instruments, then real-time position data can be obtained, but measurement precision deteriorates in certain procedural conditions
Solution Approach 1:
The patent combines electromagnetic tracking with optical tracking systems into a unified navigation system. The electromagnetic system provides real-time continuous tracking while the optical system provides high-precision reference measurements. The system merges data from both sources to achieve both real-time performance and measurement precision simultaneously.
Solution Approach 2:
The patent introduces alignment guides and reference frames as intermediary elements that connect the electromagnetic and optical tracking systems. These intermediaries provide common reference points that allow the two different tracking modalities to be correlated and work together, enabling the electromagnetic system to achieve optical-level precision while maintaining real-time performance.
2Measurement precision
If optical tracking systems are used to determine instrument location, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent designs the optical tracking system to serve multiple functions: it provides high-precision position measurement, establishes reference frames for electromagnetic tracking calibration, and verifies instrument location. By making the optical system multi-functional, the patent reduces the need for separate systems and justifies the complexity through multiple benefits.
Solution Approach 2:
The patent performs preliminary calibration and registration of the optical tracking system before the actual surgical procedure. Reference frames are established and aligned with anatomical landmarks in advance. This preliminary action reduces the complexity during the actual procedure because the system is pre-configured and does not require real-time complex adjustments.
3Reliability
If alignment guides are fixed to the subject for stable positioning, then reliability improves, but ease of operation deteriorates
Solution Approach 1:
The patent designs the alignment guide system with dynamic characteristics, allowing it to be adjusted and repositioned during the procedure. The guides can be temporarily fixed, adjusted, and re-fixed as needed. This dynamic capability maintains reliability through stable fixation while improving ease of operation through adjustability.
Solution Approach 2:
The alignment guide system is divided into multiple segments or components that can be independently adjusted. Rather than a single rigid structure, the system uses modular elements that can be positioned and secured separately, making the overall system easier to operate while maintaining stability when assembled.
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
Enables accurate and efficient navigation of instruments in complex procedures by providing real-time tracking and alignment, ensuring instruments are positioned according to a pre-planned trajectory, enhancing the precision and safety of surgical and assembly operations.
Implementation Method 1
measuring an effect of a magnetic field on a sensor coil where a current is induced in the sensor coil
Implementation Method 2
determining a location with optical sensors. The optical tracking system includes a set of cameras with a field of vision to triangulate a position of the instrument
Data Source
AI summary
Disclosed is a guide or alignment system. The system may be used to at least assist in a procedure. The system may assist in aligning objects and/or determining physical boundaries for a selected portion of the procedure.