AR Headset Anatomical Referencing for Joint Pivot Axes
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Solution Overview
Problem
Current medical procedures face challenges in accurately identifying and referencing anatomical structures, particularly joint pivot axes, during surgeries like knee replacements, which can lead to inaccuracies in ligament attachment and bone realignment.
Innovation Solution
The use of augmented reality (AR) systems with AR headsets to identify and reference anatomical features by registering markers on anatomical structures, determining joint pivot axes, and providing isometric points for ligament attachment, allowing for precise measurements and realignment of bones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional surgical methods are used to identify joint pivot axes, then the surgical procedure can be performed, but the accuracy of identifying anatomical structures is insufficient
Solution Approach 1:
The patent introduces augmented reality overlays as an intermediary between the surgeon and the anatomical structures. Virtual anatomical landmarks, joint pivot axes, and measurement data are projected onto the surgical field through AR glasses, allowing surgeons to see invisible or difficult-to-visualize anatomical features without directly observing them with the naked eye.
Solution Approach 2:
The patent replaces traditional mechanical measurement tools and visual inspection methods with optical and computational systems. AR technology combined with pre-operative imaging data and intra-operative sensors substitutes for manual measurement and visual identification, providing more precise and reliable anatomical referencing.
2Manufacturing precision
If manual measurement and referencing methods are used, then the surgical procedure can proceed, but the precision of ligament attachment and bone realignment is compromised
Solution Approach 1:
The system provides real-time feedback to the surgeon by overlaying measured anatomical data, joint pivot axis locations, and alignment guidance directly in the surgical field. As the surgeon manipulates bones or implants, the AR system continuously updates the displayed measurements and guidance, allowing for immediate correction and precise achievement of target alignment.
Solution Approach 2:
The patent performs preliminary measurement, calculation, and visualization of anatomical landmarks and joint pivot axes before the actual surgical intervention. Pre-operative imaging data is processed to create virtual anatomical models, and key reference points are identified and displayed in advance, allowing the surgeon to plan and execute procedures with predetermined precision.
3Productivity
If conventional surgical referencing techniques are employed, then the surgery can be completed, but the time required for accurate measurement and alignment increases
Solution Approach 1:
The patent merges multiple functions into a single integrated system: pre-operative imaging, real-time tracking, measurement calculation, and visual guidance are combined in the augmented reality interface. This consolidation eliminates the need for separate measurement steps and multiple reference tools, allowing surgeons to perform accurate anatomical referencing and alignment measurements more quickly.
Solution Approach 2:
The AR-based referencing system serves multiple functions simultaneously: it displays anatomical landmarks, calculates joint pivot axes, provides measurement data, guides implant placement, and monitors alignment all through a single interface. This multi-functionality replaces numerous separate surgical tools and procedures, improving surgical efficiency.
Data Source
AI summary
Technology is described for referencing anatomical structure using an AR headset. The method can include registering a marker located on a distal anatomical structure. The marker may have a pose that includes a position and orientation in a 3D coordinate system of the AR headset. Another operation may be identifying a proximal anatomical structure to which the distal anatomical structure is connected. The marker may be registered at a second pose having a second position and second orientation. A joint pivot axis and angle may be determined with respect to the proximal anatomical structure by comparing the first pose and the second pose. The joint pivot axis may then be displayed, using the AR headset. The technology may also use a pointer device to automatically find an anatomic path and anatomic length.