A brain measurement apparatusM1 includes: a magnetoencephalograph including optically pumped magnetometers1A, magnetic sensors2 for measuring a static magnetic field at positions of the optically pumped magnetometers, and a nulling coil16 for canceling the static magnetic field; an MRI apparatus including a permanent magnet, a gradient magnetic field coil8, a transmission coil21, and a receive coil22 for detecting a nuclear magnetic resonance signal; and a control device5 that, when measuring the brain's magnetic field, controls a current to be supplied to the nulling coil16 based on measured values of the magnetic sensors2 and operates so as to cancel a static magnetic field at the position of each of the optically pumped magnetometers1A and, when measuring an MR image, controls the gradient magnetic field by controlling a current to be supplied to the gradient magnetic field coil8 and generates an MR image based on an output of the receive coil22.
BRAIN MEASUREMENT APPARATUS AND BRAIN MEASUREMENT METHOD