Biosignal Detector Alignment via 3D Surface Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing biosignal detector arrangements face challenges in reproducing accurate positions over time, particularly in longitudinal studies, due to errors in recognizing and measuring anatomical feature points, which affects test-retest reliability.
Innovation Solution
A system and method that utilize surface data and position data from an object to display and align the initial and real-time positions of a biosignal detector using augmented reality technology, allowing for precise registration and reproducibility without relying on optical sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the 10-20 system with anatomical feature points is used to arrange biosignal detectors, then the arrangement can be reproduced using anatomical landmarks, but errors occur in recognizing or measuring the anatomical feature points
Solution Approach 1:
The patent creates a 3D digital copy (surface map) of the subject's head surface and stores the precise coordinates of anatomical feature points and detector positions within this digital model. This digital copy can be repeatedly referenced without physical remeasurement, eliminating measurement errors while maintaining reproducibility. The surface map serves as a persistent reference that captures the exact geometry and feature point locations.
Solution Approach 2:
The patent replaces the manual mechanical measurement system (physical measurement of anatomical feature points with rulers or calipers) with an optical scanning system that captures the head surface geometry. This substitution eliminates human error in identifying and measuring feature points, as the 3D surface map objectively records the precise spatial relationships between anatomical landmarks and detector positions.
2Measurement precision
If optical sensors are used to track biosignal detector positions, then real-time position tracking can be achieved, but the system complexity increases
Solution Approach 1:
The patent extracts only the necessary positional information from complex optical tracking systems by using the pre-established 3D surface map as a reference framework. Instead of implementing a full optical sensor system, the invention extracts position data relative to the stored surface geometry, simplifying the overall system while maintaining tracking precision through registration of detector positions to the digital twin.
Solution Approach 2:
The patent performs preliminary action by creating the 3D surface map and storing anatomical feature point coordinates before the actual biosignal detection begins. This pre-established digital reference framework eliminates the need for complex real-time optical tracking infrastructure, as positions can be determined by referencing the pre-captured surface geometry and stored coordinate system.
Data Source
AI summary
Disclosed is a system and method of directing a biosignal detector arrangement. The system for directing a biosignal detector arrangement may include a biosignal detector configured to detect a biosignal of an object, a measurer configured to obtain, in real-time, information including surface data of the object and position data associated with an arrangement of the biosignal detector relative to the object based on the surface data, a processor configured to set initially obtained information of the obtained information as reference information for a surface registration and compare the reference information to finally obtained information of the obtained information, and a display configured to display the reference information and the finally obtained information.