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

Claim 10:
11. A brain measurement method using 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 and 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, the method comprising:
when measuring the brain's magnetic field, controlling 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 operating 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, controlling the gradient magnetic field by controlling a current to be supplied to the gradient magnetic field coil and generating an MR image based on an output of the receive coil.