2-D magnetic particle imaging based on actively feed-through fundamental frequency recovery

Abstract

In the Magnetic particle imaging (MPI) scanner, the fundamental frequency component of the particle signal cannot be accurately detected due to the mutual inductance between the excitation coil and detection coil. In this work, we proposed a method to recover the fundamental frequency component of the particle signal, which uses the hardware circuit to implement the real-time difference between the direct feed-through signal caused by the excitation field and the actively generated feedforward cancelation signal. As a result, we successfully acquired the complete particle signal and reconstructed the 2-D image by the X-Space reconstruction algorithm. The experiment results demonstrated the method could improve the sensitivity of the MPI scanner.