Vector modulator based active compensation of direct feedthrough

Series

Abstract

In magnetic particle imaging (MPI), simultaneous excitation and signal acquisition leads to direct feedthrough problems. While this direct-feedthrough can be mitigated up to some extent with passive compensation, this may not be sufficient given the time-variant nature of the system. Active compensation methods are proposed to overcome this challenge. In magnetic resonance imaging (MRI), we have recently proposed a promising active compensation technique that uses a vector modulator-like structure to modify a copy of the transmitted signal and use it for subtracting the direct-feedthrough in analog domain. In this work, this technique is adapted to MPI for active compensation of the direct-feedthrough. We demonstrate a significant increase in detection sensitivity at the fundamental harmonic on an in-house arbitrary waveform relaxometer.

Source Title

International Journal on Magnetic Particle Imaging

Publisher

Infinite Science Publishing

Course

Other identifiers

Book Title

Keywords

Degree Discipline

Degree Level

Degree Name

Citation

Published Version (Please cite this version)

Language

English