Endoscopic Navigation System Correcting Barrel Lens Distortion
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Solution Overview
Problem
Endoscopic surgery faces challenges in navigating flexible endoscopes to target anatomy due to limited field of view and complex body structures, especially in endoluminal surgery where the distance from the entry point to the target anatomy is significant, making it difficult for surgeons to localize lesions and navigate accurately.
Innovation Solution
A Visual Navigation System (VNS) is developed, comprising a data acquisition subsystem, endoscope tracking subsystem, registration subsystem, and user interface subsystem, which inputs intra-operative scan data, captures endoscope position and orientation data, and coregisters it with pre-operative data to provide real-time 3D visualization and navigation assistance, correcting for barrel lens distortion and enabling six degrees of freedom in video navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible endoscope is used to navigate through natural body lumens to reach distant target anatomy, then the ability to perform minimally invasive endoluminal surgery is enabled, but the difficulty of localization and navigation increases significantly
Solution Approach 1:
The system transforms 2D endoscopic video images into 3D visualized anatomy with spatial context. By integrating endoscope position data with pre-operative 3D scan data, the system creates a three-dimensional representation that adds depth and spatial orientation information, enabling surgeons to localize target lesions more accurately in complex anatomical structures
Solution Approach 2:
The system introduces an intermediary visual navigation display that combines multiple data sources (endoscopic video, 3D scan data, endoscope position tracking) into a unified augmented reality interface. This intermediary visualization layer mediates between the raw sensory input and the surgeon's decision-making, providing enhanced spatial awareness and target localization without requiring direct observation of complex anatomical structures
2Adaptability or versatility
If the distance from entry point to target anatomy increases, then more complex surgical procedures become accessible, but navigation accuracy and field of view decrease
Solution Approach 1:
The system compensates for increased navigation distance by adding third-dimensional spatial context and overlaying 3D anatomical models onto the 2D endoscopic view. This dimensional enhancement provides continuous spatial orientation and target location information regardless of distance from the entry point, maintaining navigation accuracy throughout the procedure
Solution Approach 2:
The system provides continuous feedback by tracking endoscope position in real-time and updating the 3D visualization accordingly. The visual navigation system continuously compares actual endoscope location with the planned surgical path and target anatomy, providing feedback guidance that maintains navigation accuracy even over long distances through complex lumens
Data Source
AI summary
An endoscopic surgical navigation system comprises a path correlation module that can compute the path taken by an endoscope scope or other medical instrument during an endoscopic medical procedure and various related attributes and parameters, and can compute and display a correlation between two paths.