Phase offset Calibration of Instantaneous Position for Magnetic Particle Imaging

Abstract

Magnetic particle imaging using X-space reconstruction typically requires the knowledge of the Field-Free Point (FFP) position at each time point. Due to the fixed sampling delay caused by imperfections in electronic components, it is necessary to calibrate the phase of the periodic position signal. In this study, we use the current sensor signal mapping to obtain the initial value of the instantaneous position, the eigenvalues of the reconstructed images are used to reflect the degree of phase offset, and the calibration result is calculated automatically by the program through the software modulation. Experimental results show that our phase calibration for correcting instantaneous position is simple, effective, and fast.