Development of contact less brain wave monitoring device using highly sensitiveMI sensor and its application for medical diagnosis

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We have developed a gradiometer based on highly sensitive magnetoimpedance (MI) sensor aiming for non-contact brain wave measurement. The measurement results of magnetic field at the back of head support that the developed prototype sensor system is useful for non-contact brain wave measurement or magnetoencephalography measurement without magnetic shielding. We investigated relation between electrical activity and magnetic activity in a smooth muscle tissue isolated from guinea pig.