AR Joint Arthroplasty Guidance for Implant Positioning Accuracy
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Solution Overview
Problem
Conventional computer-assisted surgical navigation systems for joint reconstruction and replacement surgeries are cumbersome, time-consuming, and lack user-friendly features, leading to challenges in implant positioning and hand-eye coordination due to separate coordinate systems between surgical and external monitors, and insufficient guidance on bone cuts and implant sizing.
Innovation Solution
An augmented reality system that blends the surgical scene with a virtual environment using head-mounted displays or portable devices, allowing real-time registration and overlay of virtual surgical plans onto the actual scene, providing step-by-step guidance and improved accuracy through intra-operative imaging and sensor integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional computer-assisted surgical navigation systems are used, then implant positioning can be guided, but the system becomes time-consuming and cumbersome with bulky hardware
Solution Approach 1:
The patent uses virtual copies of the patient's anatomy generated from preoperative imaging (CT, MRI, X-rays) to create a digital twin model. This virtual model replaces the need for complex physical registration tools and bulky navigation hardware, enabling rapid setup while maintaining positioning accuracy through computational guidance
Solution Approach 2:
The patent replaces mechanical navigation systems with a software-based virtual navigation approach. Instead of using physical guides, trackers, and mechanical alignment tools, the system uses computer-generated 3D models and virtual surgical planning to guide implant placement, eliminating bulky hardware and reducing setup time
2Loss of information
If pre-operative plans are displayed on external monitors, then surgical guidance is provided, but hand-eye coordination becomes challenging due to different coordinate systems
Solution Approach 1:
The patent merges the surgical guidance information directly with the surgical field by overlaying virtual anatomical models, implant positions, and surgical guides onto the actual patient anatomy through augmented reality or head-mounted displays. This integration eliminates the separation between the monitor and the surgical site, restoring natural hand-eye coordination while maintaining comprehensive surgical guidance
Solution Approach 2:
The patent transitions from a separate 2D monitor display to a 3D spatial overlay that integrates virtual information with the physical surgical environment. By embedding guidance information in the same spatial dimension as the surgical field, the system eliminates coordinate system discrepancies and improves operator interaction
3Loss of information
If conventional navigation systems are used, then surgical guidance is provided, but the hardware occupies valuable space and causes line-of-sight issues
Solution Approach 1:
The patent replaces physical hardware with virtual copies of anatomical structures and surgical guidance elements. The 3D virtual models and digital surgical plans are displayed through head-mounted displays or augmented reality, eliminating bulky hardware from the operating room while maintaining comprehensive surgical guidance information
Solution Approach 2:
The patent moves surgical guidance information from the 2D plane of external monitors to the 3D space of augmented reality overlays. This dimensional transition allows guidance information to be displayed directly in the surgical field without occupying physical space or obstructing line-of-sight, as the information is projected virtually rather than through physical hardware
Data Source
AI summary
Systems and methods of providing augmented reality assisted surgery are disclosed. Certain aspects provide a method including generating a virtual scene comprising one or more virtual elements comprising one or more anatomical elements corresponding to one or more anatomy parts. The method further includes identifying one or more references in an actual physical scene comprising the one or more anatomy parts. The method further includes registering the virtual scene to the one or more references to generate an augmented scene. The method further includes displaying the augmented scene on a display device.