Surgical Navigation View Control for Dynamic Entry Point Alignment
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Solution Overview
Problem
Existing surgical navigation systems lack the ability to accurately and quickly align surgical instruments with planned entry points, often resulting in deviations from the intended trajectory and target during surgical procedures.
Innovation Solution
A computer-implemented method that controls the display of a navigation view by instantaneously changing the recommended entry point based on predefined conditions, such as distance thresholds, to ensure alignment with the planned target, using tracking data and planning data to adjust the visualization in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the surgical instrument is aligned with both the planned entry point and the planned trajectory, then the alignment accuracy is improved, but it becomes difficult to achieve in practice due to free-hand alignment limitations
Solution Approach 1:
The navigation view provides real-time visual feedback by displaying the current entry point, trajectory, and deviation indicators. The system continuously monitors the surgical instrument's position and orientation relative to the planned trajectory and entry point, and updates the navigation view accordingly. This feedback loop enables the surgeon to make incremental adjustments to achieve accurate alignment without requiring perfect free-hand alignment skills.
Solution Approach 2:
The navigation view acts as an intermediary between the surgeon's free-hand alignment attempts and the actual surgical instrument positioning. By providing visual cues such as the current entry point, trajectory overlay, and deviation indicators, the navigation view mediates the alignment process, translating the surgeon's manual adjustments into accurate instrument positioning relative to the planned trajectory and entry point.
2Measurement precision
If the recommended entry point is continuously updated in real-time, then the alignment precision is improved, but the computational load and system complexity increase
Solution Approach 1:
The system performs preliminary calculations by pre-defining the planned trajectory and entry point based on the target and anatomical constraints. These pre-calculated reference elements are stored and used as the basis for real-time updates. During surgery, only the current entry point and trajectory need to be updated based on instrument tracking data, rather than recalculating the entire surgical plan, thereby reducing computational load while maintaining precision.
Solution Approach 2:
The navigation system implements dynamic updates of the recommended entry point and trajectory based on real-time tracking of the surgical instrument's position and orientation. The system adapts the navigation view to reflect the current surgical state, updating only the necessary parameters (current entry point, current trajectory) while maintaining the planned target and anatomical references. This dynamic approach provides real-time precision without requiring complete recalculation of the surgical plan.
3Measurement precision
If the navigation view displays detailed alignment information, then the alignment accuracy is improved, but the visual complexity and information overload increase
Solution Approach 1:
The navigation view is segmented into distinct functional zones: the planned target is displayed as a reference point, the planned trajectory and current trajectory are shown as separate overlay elements, the planned entry point and current entry point are marked differently, and deviation indicators are provided as separate visual cues. This segmentation allows the surgeon to process each element independently, reducing visual complexity while maintaining comprehensive alignment information.
Solution Approach 2:
Different visual elements in the navigation view are distinguished by color coding: the planned trajectory and current trajectory are displayed in different colors, the planned entry point and current entry point are marked with distinct color indicators, and deviation indicators use color variations to indicate alignment quality. These color changes enable rapid visual processing of multiple parameters without information overload, as the surgeon can immediately distinguish between different types of information through color cues.
Data Source
AI summary
A method of controlling display of a navigation view for surgical navigation is described. The method comprises obtaining a planned entry point and a planned target, obtaining a current orientation of a surgical instrument, determining a current entry point, and controlling display of a navigation view indicating at least a recommended entry point. The recommended entry point is instantaneously changed from the planned entry point to the current entry point, upon a distance between the planned entry point and the current entry point fulfilling a predefined condition. Also disclosed are a processor, a computer-readable medium and a data carrier signal.