Modification of the optically pumped magnetometer

According to the remote detection scheme, conven- tional MRI could be spatially separated into prepolarization, encoding and detection. Magnetometers with high sensitivity, such as optically pumped magnetometer, could then be applied in detection to improve the capability of MRI. By analyzing how the output of the servo circuit depend on modulation, optimum modulation parameters could be obtained for maximum signal amplitude and best sensitivity. In our point of view, it could provide a way to make the optically pumped magnetometer more applicable to MRI. doesn't require cryogenics. Due to the high sensitivity and simple electronics, it has the potential to be applied in the remote detection scheme. In this paper, our focus is on the modification of conventional optically pumped magnetometer for MRI. We shall begin with the main principles of the opti- cally pumped magnetometer. Then discuss the characteristics of MRI and frequency modulation in order to get the optimized parameters of the servo circuit.