Patent ID: 11914012
Assignee: KYOTO UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 0:
1. A brain measurement apparatus, comprising:
a magnetoencephalograph including multiple optically pumped magnetometers configured to measure a brain's magnetic field, multiple magnetic sensors for static magnetic field cancellation configured to measure a static magnetic field at a position of each of the multiple optically pumped magnetometers, and a static magnetic field nulling coil for canceling the static magnetic field;
an MRI apparatus including a permanent magnet 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; and
a controller configured to, when measuring the brain's magnetic field, control a current to be supplied to the static magnetic field nulling coil based on measured values of the multiple magnetic sensors for static magnetic field cancellation and operate so as to cancel a static geomagnetic field and a static magnetic field generated by the permanent magnet at the position of each of the multiple optically pumped magnetometers and, when measuring an MR image, control the gradient magnetic field by controlling a current to be supplied to the gradient magnetic field coil and generate an MR image based on an output of the receive coil.