Virtual Joint Model for Synthetic Kinematic Data Generation
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Solution Overview
Problem
Collecting patient data for training AI/ML applications in clinical settings is challenging due to ethical, effort, and privacy concerns, making it difficult to obtain sufficient and varied training data.
Innovation Solution
An electronic device simulates a joint, such as a knee joint, using virtual inertial measuring units and a calculator unit to generate kinematic data sets, allowing for the simulation of various joint movements and parameters, enabling the creation of diverse data sets with high variance in a short time and with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If patient data is collected in clinical settings to train AI/ML applications, then training data quality is improved, but collection effort and ethical complexity increase
Solution Approach 1:
The patent creates virtual copies of patient joints and movements through simulation. Instead of collecting actual patient data, the system generates synthetic kinematic data sets by modeling joint anatomy, applying virtual inertial measuring units, and simulating movements under various conditions. This copying approach maintains data quality while eliminating the complexity of real patient data collection.
Solution Approach 2:
The patent replaces the mechanical process of physical data collection in clinics with a computational simulation system. The simulation unit uses virtual models and algorithms to generate kinematic data, substituting the need for physical measurement devices, patient interactions, and clinical infrastructure with a digital ecosystem that produces equivalent training data.
2Adaptability or versatility
If real patient data is collected for AI training, then data diversity is improved, but time consumption and resource requirements increase
Solution Approach 1:
The system performs preliminary actions by pre-configuring virtual joint models with diverse anatomical variations, movement patterns, and environmental conditions before data generation is needed. The simulation unit can rapidly generate diverse data sets by varying parameters such as joint anatomy, movement speed, load conditions, and patient demographics, eliminating the need for time-consuming field collection.
Solution Approach 2:
The patent systematically varies multiple parameters including joint anatomy (varus/valgus angles, bone dimensions), movement characteristics (speed, range of motion), loading conditions, and patient demographics to generate diverse synthetic data. This parameter variation approach enables rapid creation of numerous diverse data sets without requiring actual diverse patient populations.
3Productivity
If virtual measuring units are integrated into the joint model, then data generation efficiency is improved, but model complexity increases
Solution Approach 1:
The patent embeds virtual inertial measuring units within the virtual joint model structure, creating a nested configuration where sensors are integrated into the bone models. This nesting allows the measuring units to be automatically positioned and oriented according to the joint anatomy, enabling efficient data generation while managing complexity through hierarchical integration rather than separate components.
Solution Approach 2:
The virtual inertial measuring units serve multiple functions simultaneously: they measure linear acceleration, angular velocity, and orientation of joint bones, and their data is used for both kinematic analysis and training AI/ML applications. This multi-functionality reduces the need for separate specialized measurement systems, improving efficiency while keeping the overall model manageable.
Data Source
AI summary
An electronic device for simulating a joint, in particular a knee joint, and for providing kinematic data sets, includes a simulation unit configured to generate a joint model with at least a first joint bone and a second joint bone. The simulation unit is configured to integrate at least a first and a second virtual measuring unit into the joint model. The at least first virtual measuring unit is at the at least first joint bone and the at least second virtual measuring unit is at the second joint bone. A calculator unit is configured to process data of the at least first and second virtual measuring units.
