MP66 - A Calibration Method for Spatial Localization of OPM Sen-sors Based on a Rigid Coil Array Framework
- Event
- EUROSENSORS XXXVII
2025-09-07 - 2025-09-10
Wroclaw - Band
- Poster I
- Chapter
- Quantum Sensors
- Author(s)
- W. Xu, F. Cao, Y. Li, C. Wang, X. Ning - Beihang University, Beijing (China)
- Pages
- 335 - 336
- DOI
- 10.5162/EUROSENSORS2025/MP66
- ISBN
- 978-3-910600-07-2
- Price
- free
Abstract
A calibration method based on a rigid coil array framework was developed for spatially localizing Opti-cally Pumped Magnetometer (OPM) sensors in wearable Magnetoencephalography (MEG) systems. The proposed framework integrates multiple coils into a fixed geometric configuration, enabling precise validation of sensor positioning and enhancing the front-end registration process. By incorporating the Structural Similarity Index Measure (SSIM) as an optimization objective, the method significantly im-proves localization accuracy compared to conventional approaches. Simulation results demonstrated that the localization error was maintained below 3 mm, meeting the precision requirements for OPM-MEG registration. The rigid coil array structure effectively reduced random errors introduced by manual operations and tracking systems, providing a stable reference framework for aligning sensor coordinates with anatomical brain data. This work advances both theoretical and practical aspects of OPM-MEG calibration, offering a robust solution for high-precision sensor localization.