Spatial Annotations for Pedicle Screw Sizing Accuracy
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Solution Overview
Problem
During pedicle screw implantation procedures, pre-selected screw sizes may not be optimal due to mismatches in entry points and trajectories during surgery, leading to suboptimal screw sizing.
Innovation Solution
A system and method for generating and displaying spatial annotations within guidance images during medical procedures, which provide dynamic graduations along the longitudinal axis of tracked medical instruments, allowing for real-time visual assessment of anatomical and functional features, enabling accurate selection of screw sizes based on actual surgical conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If pre-operative screw sizes are selected assuming ideal conditions, then screw sizing can be determined before surgery, but the screw sizes may not be optimal during surgery due to mismatches in entry points and trajectories
Solution Approach 1:
The system performs preliminary screw size selection during pre-operative planning based on ideal conditions, then uses intraoperative spatial annotations to verify and adjust the selection based on actual anatomical conditions and instrument positioning, combining advance preparation with real-time verification
Solution Approach 2:
The system provides real-time feedback by displaying spatial annotations that show the actual size of anatomical features relative to the positioned medical instrument, allowing the surgeon to compare pre-selected screw sizes with actual measured dimensions and make informed adjustments
2Measurement precision
If spatial annotations with known length measures are displayed in guidance images, then visual assessment of anatomical feature sizes is enabled, but the system complexity increases
Solution Approach 1:
The system introduces spatial annotations as an intermediary visual element that mediates between the complex navigation data and the surgeon's decision-making process, providing intuitive size references without requiring direct measurement calculations
Solution Approach 2:
The system creates visual copies of known length measures (spatial annotations) that are overlaid on the guidance images, allowing direct visual comparison with anatomical features without physical measurement tools
Data Source
AI summary
The present disclosure provides systems and methods for generating spatial annotations within guidance images that are displayed during a guided medical procedure, where the spatial annotations provide spatial graduations indicating known length measures. The spatial measures may be employed to visually assess the sizes of anatomical and/or functional features displayed in the guidance images.