Medical Instrument Registration via Model Path Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In image-guided medical procedures, there is a lack of accurate registration between real-time and pre-operative images, leading to uncertainty in navigating medical instruments within patient anatomy.
Innovation Solution
A system comprising a medical instrument, a tracking system, and a processor that generates model points of anatomic structures and maps measured points from the instrument's motion cycles to corresponding model paths, enabling precise registration of the instrument's position within the anatomy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional image-guided procedures are used without advanced registration systems, then the procedure is simpler to perform, but the accuracy and reliability of instrument navigation deteriorates
Solution Approach 1:
The system performs preliminary registration of the medical instrument with the pre-operative images before the actual surgical procedure. The tracking system establishes the spatial relationship between the instrument and anatomical structures in advance, creating a registered model that guides subsequent navigation. This preliminary action ensures accurate correlation between real-time instrument position and pre-planned surgical paths.
Solution Approach 2:
The patent introduces an intermediary registered model that acts as a mediator between the physical medical instrument and the virtual pre-operative images. This model includes correlated anatomical structures and surgical paths that translate real-world instrument positions into meaningful spatial relationships with target tissues, enabling accurate navigation without direct visual contact between the instrument and anatomical structures.
2Reliability
If real-time tracking and registration are implemented, then the reliability of instrument navigation is improved, but the loss of time for processing and mapping data increases
Solution Approach 1:
The system performs preliminary registration and path planning before the surgical procedure begins. Pre-operative images are processed and correlated with anatomical structures in advance, creating a ready-to-use registered model. This preliminary action reduces real-time processing requirements during the actual surgery, minimizing time loss while maintaining high navigation reliability.
Solution Approach 2:
The patent replaces complex real-time mechanical tracking and processing systems with a pre-computed registered model. Instead of continuously calculating spatial relationships during surgery, the system uses pre-established correlations between instrument positions and anatomical structures, significantly reducing real-time computational burden while maintaining navigation accuracy.
3Manufacturing precision
If detailed model points and paths are generated for registration, then the manufacturing precision of the registration model is improved, but the device complexity increases
Solution Approach 1:
The registered model is segmented into discrete model points and distinct surgical paths. Each path represents a specific navigational route through anatomical structures, and model points provide precise spatial references. This segmentation allows the complex registration model to be broken down into manageable components that can be processed and displayed efficiently without overwhelming system complexity.
Solution Approach 2:
The system extracts only the essential and relevant anatomical structures and surgical paths needed for the specific procedure from the complete pre-operative imaging data. Rather than processing all anatomical information, the system identifies and extracts the critical model points and paths required for navigation, reducing model complexity while maintaining registration precision for the areas of interest.
Data Source
AI summary
A system comprises a medical instrument, a tracking system configured to monitor a position of the medical instrument, and a processor communicatively coupled to the medical instrument and the tracking system. The processor is configured to generate a plurality of model points of an anatomic structure of a patient, receive a set of measured points of a first portion of the anatomic structure of the patient from the tracking system while the medical instrument is disposed within the anatomic structure of the patient, the set of measured points being associated with a first motion cycle of the medical instrument, map the set of measured points to a first model path of the plurality of model paths, and register the set of measured points with a first portion of the plurality of model points, the first portion associated with the first model path of the plurality of model paths.