Bone Registration Light Projection for Accurate Point Collection
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Solution Overview
Problem
Existing bone registration methods in computer-assisted orthopedic surgery are tedious, time-consuming, prone to eye strain, and require high hand-eye coordination due to manual point collection on minimally exposed bones, often covered by biological fluids and tissues, leading to potential miscollection and reduced accuracy.
Innovation Solution
A projection device that projects points onto the bone to refine registration, using a light emitter and tracking element, allowing for direct point collection without constant monitor reference, and a method involving a first and second set of points to enhance registration accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual point collection is performed by constantly moving eyes between monitor and bone, then points can be identified on the bone model, but the registration process becomes time consuming and tedious
Solution Approach 1:
A display element is introduced as an intermediary between the monitor and the bone, projecting point indicators directly onto or near the bone surface. This mediator guides the user's point collection by visually marking target locations on the bone itself, eliminating the need to constantly switch attention between the monitor and bone while maintaining identification accuracy.
2Measurement precision
If manual point collection is performed on minimally exposed bone covered by biological fluids and tissues, then registration can be performed, but point miscollection occurs reducing accuracy
Solution Approach 1:
The display element projects visually distinct point indicators with specific colors or luminance characteristics directly onto the bone surface or adjacent area. These colored or illuminated markers stand out against the biological fluids and tissues, making it easier for the user to identify and collect the correct points while maintaining registration accuracy.
3Productivity
If points are projected directly onto the bone, then point collection efficiency and accuracy improve, but a projection device with light emitter and tracking element is required
Solution Approach 1:
The projection device is designed to perform multiple functions: it projects point indicators onto the bone, tracks the bone's position and orientation in real-time, and communicates with the surgical system's registration software. This multi-functional design consolidates what would otherwise require separate devices into one integrated system, justifying the added complexity through enhanced productivity and accuracy.
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
Improves point collection efficiency and accuracy by guiding users to collect points directly on the bone, reducing eye strain and increasing registration precision through real-time projection and digitization.
Implementation Method 1
a light emitter that projects the one or more points on the patient's bone
Data Source
AI summary
A system, device, and method is provided that improves the point collection process during bone registration for computer-assisted surgical procedures. A user is guided in the point collection process by projecting a set of points directly on the bone with a tracked digitizer probe following a rough registration of the bone. The system, device, and method therefore negates the need for the user to constantly look-up on an instructional display monitor and make the complicated mappings between the displayed instructions on the monitor and the actual bone.