Premium
Magnetic susceptibility quantification for arbitrarily shaped objects in inhomogeneous fields
Author(s) -
Li Lin
Publication year - 2001
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1276
Subject(s) - physics , magnetic field , nuclear magnetic resonance , magnetic susceptibility , condensed matter physics , quantum mechanics
Magnetic susceptibility measurement has wide‐ranging applications in MR technical development and medical applications. A general susceptibility quantitation method for objects of arbitrary shapes in inhomogeneous magnetic fields is presented in this study. Based on the mean value properties of magnetic fields, the polarizing magnetic field at the location of interest inside an object can be exactly obtained in situ from the field values on a spherical surface enclosing the object. With numerical computation of the self‐demagnetizing field and correction of contact shifts, magnetic susceptibilities were quantitatively measured for CuSO 4 phantoms based on their MR gradient echo phase maps. Magn Reson Med 46:907–916, 2001. © 2001 Wiley‐Liss, Inc.