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Updated: Aug 7, 2026
07:01
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
Published on: June 9, 2016
Active magnetic compensation composed of shielding panels
1Takenaka Corp., Chiba, Japan. katou.kazuo@takenaka.co.jp
Neurology & Clinical Neurophysiology : NCN
|July 14, 2005
Summary
A novel active shielding system using modular panels offers superior magnetic noise reduction for biomagnetic measurements. This system provides a larger compensation space and adaptable configurations compared to traditional methods.
Area of Science:
- Biophysics
- Applied Physics
- Biomagnetism
Background:
- Traditional magnetically shielded rooms (MSRs) utilize high-permeability materials and active shielding, but present limitations.
- Existing active systems often rely on large coils, which can be cumbersome and less adaptable.
Purpose of the Study:
- To develop and evaluate a new magnetic shielding system using modular panels and active compensation.
- To assess the shielding performance of this novel system for biomagnetic measurements.
Main Methods:
- The study involved numerical simulations and experimental validation of a shielding system constructed from interconnected unit panels.
- Performance was evaluated using a cubic model assembled from 24 panels.
Main Results:
- The shielding system achieved a shielding factor of 17 for uniform magnetic fields.
- A shielding factor of 7 was recorded for dynamic disturbances, such as those from car movement.
- The active compensation system demonstrated a larger effective compensation space compared to conventional coil-based systems.
Conclusions:
- The developed panel-based active shielding system is effective for reducing magnetic noise in biomagnetic measurements.
- Its modularity, light weight, and adaptability allow for flexible assembly into various shapes.
- This system presents a promising alternative to traditional MSRs, offering enhanced performance and practicality.
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