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Published on: June 9, 2016
High-Frequency Weak Magnetic-Field Detection and Dose Calibration for Micro-Magnetic Stimulation: A Review
Lei Tian1,2, Hang Tu1, Jiahao Fei1
1School of Control Science and Engineering, Tiangong University, Tianjin 300387, China.
Sensors (Basel, Switzerland)
|August 13, 2026
Summary
Accurately measuring high-frequency magnetic fields from micro-coils is crucial for micro-magnetic stimulation (μMS) dose calibration. This review covers advanced detection techniques and highlights future needs for reliable magnetic field measurement and dose standardization.
Area of Science:
- Biomedical Engineering
- Neuroscience
- Physics
Background:
- High-frequency weak magnetic fields from micro-coils are vital for micro-magnetic stimulation (μMS) dose.
- Accurate measurement is challenging due to low amplitude, localized fields, and probe complexities.
Purpose of the Study:
- To review recent advances in high-frequency weak magnetic field detection for micro-coil systems.
- To discuss measurement challenges and existing detection methods.
Main Methods:
- Classified existing methods into direct measurement, resonance-enhanced detection, spatial-field mapping, and adaptive compensation.
- Compared methods based on frequency range, sensitivity, spatial resolution, complexity, and online integration.
Main Results:
- Identified key challenges: probe parasitics, impedance mismatch, phase distortion, spatial averaging, and dynamic detuning.
- Highlighted the need for traceable relationships between detector output, magnetic fields, and stimulation dose.
Conclusions:
- Emphasized the need for standardized magnetic field measurement and dose calibration in μMS.
- Proposed future directions: broadband adaptive measurement, online dose calibration, and advanced imaging techniques for closed-loop neuromodulation.
