Magnetic resonance imaging measurement of volume magnetic susceptibility using a boundary condition

A magnetic resonance imaging method is described for measuring the magnetic susceptibility difference between two homogeneous macroscopic compartments in contact with each other, A boundary condition is derived for the interf ace of the two compartments, This boundary condition predicts that across t he interface there is a resonant frequency jump, which is a function of int erfacial orientation relative to B-0 field and the difference in susceptibi lity of the two sides. Based on this relationship, the magnetic susceptibil ity difference between two materials can be obtained from MR gradient echo imaging using signals from both sides in the vicinity of the boundary. This method is demonstrated by solution phantom experiments, (C) 1999 Academic Press.