Distributions of discrete spherical particles with a constant susceptibility can lead to echo time dependent phase shifts which deviate from theories

摘要

Purpose: When an object contains a distribution of discrete magnetic inclusions with a constant susceptibility, the MRI signal inside the object may no longer be determined analytically by assuming that the object is uniform or magnetic inclusions are completely random. Through simulations and experiments with spherical particles inside cylinders, this work is to study the signal behavior in the static dephasing regime.