In magnetic particle imaging (MPI), simultaneous excitation and signal acquisition leads to direct feedthrough interference. While this interference can be mitigated up to some extent with passive compensation, its time-varying nature necessitates active compensation methods to achieve the sensitivity levels needed for applications such as stem cell tracking. We have recently proposed an active compensation technique for MRI, which uses a vector modulator and a lookup-table-based algorithm for reducing the direct feedthrough in the analog domain. Here, we adapt this technique to MPI, demonstrating a successful recovery of the fundamental frequency and a significant increase in detection sensitivity.
@article{arxiv.2402.08175,
title = {Vector Modulator Based Active Compensation of Direct Feedthrough in Magnetic Particle Imaging},
author = {Bilal Tasdelen and Mustafa Utkur and Asli Alpman and Can Baris Top and Ergin Atalar and Emine Ulku Saritas},
journal= {arXiv preprint arXiv:2402.08175},
year = {2024}
}
Comments
10 pages, 7 figures, 1 table. Preliminary versions of this work were presented at the 10th International Workshop on Magnetic Particle Imaging (IWMPI 2020) and the Annual Meeting of International Society for Magnetic Resonance in Medicine (ISMRM 2021)