Patent ID: 11957472
Assignee: KYOTO UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 8:
9. A brain measurement apparatus, comprising:
a magnetoencephalograph including multiple optically pumped magnetometers configured to measure a brain's magnetic field, multiple magnetic sensors for geomagnetic field cancellation configured to measure a magnetic field relevant to geomagnetic field at a position of each of the multiple optically pumped magnetometers, multiple magnetic sensors for active shield configured to measure a fluctuating magnetic field at the position of each of the multiple optically pumped magnetometers, a geomagnetic field nulling coil for cancelling the magnetic field relevant to the geomagnetic field, and an active shield coil for cancelling the fluctuating magnetic field;
an MRI apparatus including a static magnetic field coil for applying a static magnetic field, a gradient magnetic field coil for applying a gradient magnetic field, a transmission coil for transmitting a transmission pulse having a predetermined frequency, and a receive coil for detecting a nuclear magnetic resonance signal generated by the transmission of the transmission pulse;
a controller configured to, when measuring the brain's magnetic field, control a current to be supplied to the geomagnetic field nulling coil and a current to be supplied to the active shield coil based on measured values of the multiple magnetic sensors for geomagnetic field cancellation and measured values of the multiple magnetic sensors for active shield and, when measuring an MR image, control the static magnetic field and the gradient magnetic field by controlling currents to be supplied to the static magnetic field coil and the gradient magnetic field coil and generate an MR image based on an output of the receive coil,
wherein the multiple optically pumped magnetometers, the multiple magnetic sensors for geomagnetic field cancellation, the multiple magnetic sensors for active shield, and the receive coil are fixed to a non-magnetic frame above a measurement location.