Catheter Positioning GUI for 3D Tip-to-Target Navigation
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Solution Overview
Problem
Existing minimally invasive medical procedures lack effective guidance systems for navigating interventional instruments to target locations within patient anatomy, leading to potential tissue damage and increased recovery time.
Innovation Solution
A graphical user interface (GUI) is used to display symbols representing the target location and the tip portion of the interventional instrument, along with navigation aids to guide the instrument to the target, incorporating three-dimensional distance and directional information, enhancing the precision of instrument placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a graphical user interface with multiple display windows and navigation aids is implemented, then the guidance precision and instrument navigation accuracy are improved, but the device complexity and information processing requirements increase
Solution Approach 1:
The graphical user interface is segmented into multiple functional windows: a first window displaying navigation aid images with symbolic representations of target locations and instrument positions, a second window displaying endoscopic camera images, a third window displaying virtual endoscopic modeled images, a fourth window displaying virtual pathway modeled images, and a fifth window displaying pre-operative images with marks. This segmentation allows complex information to be organized into manageable, specialized display areas, improving guidance precision while making the overall system more manageable despite the increased number of components.
Solution Approach 2:
The system transforms three-dimensional spatial relationships within the patient anatomy into two-dimensional symbolic representations on the display screen. The navigation aid image in the first window uses symbols to represent three-dimensional positions of target locations and instrument tip portions, along with directional indicators and distance measurements. This dimensional transformation allows complex 3D navigation information to be effectively communicated in a 2D interface, improving measurement precision without requiring complex 3D display hardware.
2Measurement precision
If real-time position tracking and multiple image displays are implemented, then the instrument navigation accuracy is improved, but the information processing load and system resource requirements increase
Solution Approach 1:
The system creates multiple virtual copies and representations of the same physical space and objects: symbolic representations in the navigation aid image, virtual endoscopic modeled images, virtual pathway modeled images, and pre-operative images with marks. Instead of requiring multiple physical cameras or sensors, the system processes and displays multiple virtual representations of the anatomical space, reducing physical hardware requirements while maintaining high navigation accuracy through comprehensive multi-perspective information display.
Solution Approach 2:
Pre-operative images with marked target locations are prepared and displayed in advance in the fifth window, allowing the surgical team to plan and identify target locations before the actual procedure. This preliminary preparation of visual information reduces the real-time information processing load during the procedure, as key reference points are already established and can be quickly referenced without requiring complex real-time analysis.
Data Source
AI summary
A method comprises receiving a position of a tip portion of an instrument at a first location within a patient anatomy and determining a three-dimensional distance between the first location and a target location within the patient anatomy. The method further comprises displaying on a display system an image that includes a target location symbol and an instrument tip portion symbol. The method further comprises displaying on the display system a symbol indicating a direction between the position of the tip portion and the target location. As the tip portion of the instrument changes position, the image is displayed so that the instrument tip portion symbol is a frame of reference for the image and the target location symbol moves with respect to the instrument tip portion symbol to represent a new location of the tip portion relative to the target location.