Headset Surgical Navigation With 3D Model Alignment
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Solution Overview
Problem
Existing surgical navigation systems are cumbersome, costly, and lack the ability to provide a first-person perspective with integrated depth perception, often requiring cumbersome fiducial markers and remote displays, and are prone to line-of-sight issues and high computational complexity.
Innovation Solution
A wearable headset system using reflected light and radio beacons for alignment, combined with a computing machine for real-time data fusion, allowing a first-person perspective with integrated depth perception and segmentation of anatomical structures, enabling seamless integration with the surgeon's natural visual field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional surgical navigation systems use retroreflective optical beacons and image analysis to track camera position, then depth and location measurement is achieved, but the system becomes cumbersome and complex requiring fiducial markers to be fastened to bones and surgical tools
Solution Approach 1:
The patent extracts and removes the cumbersome retroreflective optical beacons and fiducial markers from the surgical field. Instead of requiring physical markers on bones and tools, the system uses a camera mounted on the surgical headset to capture images and employs computational methods to determine camera position and orientation relative to the patient's anatomy, thereby simplifying the system while maintaining measurement precision
Solution Approach 2:
The patent replaces the mechanical/optical tracking system (retroreflective beacons, physical fiducials) with a computational imaging system. The camera captures visual information and software algorithms process the images to calculate spatial relationships, substituting physical tracking infrastructure with digital image analysis and computation
2Loss of information
If surgical navigation systems superimpose virtual images on nearfield elements such as surgeon's hands, then visual information is provided, but hand-eye coordination is defeated
Solution Approach 1:
The patent resolves the hand-eye coordination conflict by changing the spatial dimension of virtual image presentation. Instead of superimposing 2D virtual images on the 2D surgical field plane (which overlaps with hands), the system uses stereoscopic 3D display technology to present virtual images in depth, allowing the surgeon to perceive spatial relationships without visual obstruction of hands in the actual surgical field
3Loss of information
If conventional systems use remote displays accessed by looking up and away from surgical site, then virtual images are displayed, but surgeon's focus is disrupted
Solution Approach 1:
The patent merges the surgical field view and virtual navigation images into a single integrated visual experience through a head-mounted display. The camera is mounted on the headset and captures the surgeon's point of view, with virtual images overlaid in the correct spatial context, allowing the surgeon to maintain focus on the surgical site while simultaneously accessing navigation information without looking away
4Measurement precision
If surgical navigation systems require immobilization of patient in reference frame device, then accurate positioning is achieved, but patient mobility is restricted
Solution Approach 1:
The patent extracts and eliminates the need for immobilizing reference frame devices attached to the patient. Instead of requiring the patient to be固定在 a reference frame, the system uses the camera's visual field and image analysis to establish spatial relationships dynamically, allowing patient movement while maintaining positioning accuracy through continuous image capture and computational processing
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables a compact, cost-effective, and efficient surgical navigation system that provides real-time, integrated depth perception and reduces computational complexity, allowing for precise surgical guidance without line-of-sight limitations.
Implementation Method 1
receiving an external three-dimensional model of a surgical site from a viewpoint of a headset, wherein the external three-dimensional model is derived from reflected light
Implementation Method 2
A wearable headset system using reflected light and radio beacons for alignment
Data Source
AI summary
In at least one embodiment, a method of surgical navigation is provided. The method includes receiving an external three-dimensional model of a surgical site from the viewpoint of a headset, wherein the external three-dimensional model is derived from reflected light. The method further includes aligning the external three-dimensional model with an internal three-dimensional model of the surgical site from the viewpoint of the headset, wherein the internal three-dimensional model is derived from medical imaging, and generating an aligned view. The method further includes providing the aligned view to the headset, and updating the aligned view in real-time while the headset is moved or the surgical site is moved or modified during a surgical procedure.