System and method for controlling undesired magnetic field effects in magnetic resonance imaging

摘要

A system and method are provided for determining a spatial distribution of susceptibility in a subject using a magnetic resonance imaging (MRI) system. The method includes directing the MRI system to acquire imaging data from an imaging volume within a subject, wherein the imaging volume is subject to both background fields (B_B) originating outside the imaging volume and local fields (B_L) originating from tissue within the imaging volume. The method also includes selecting a size and non-central compute point for an extended Poisson kernel to be applied to the imaging data, subtracting from a delta function to control the background fields (B_B) but not the local fields (B_L), and producing a susceptibility report attributable to the local fields (B_L).