Premium
In vivo rapid magnetic field measurement and shimming using single scan differential phase mapping
Author(s) -
Kanayamay Shoichi,
Kuhara Shigehide,
Satoh Kozo
Publication year - 1996
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.1910360421
Subject(s) - echo planar imaging , in vivo , computer science , magnetic field , phase (matter) , field (mathematics) , gradient echo , nuclear magnetic resonance , magnetostatics , echo (communications protocol) , biomedical engineering , magnetic resonance imaging , physics , mathematics , radiology , medicine , microbiology and biotechnology , quantum mechanics , pure mathematics , biology , computer network
In vivo shimming is a powerful tool for alleviating subjectdependent magnetic field distortions in MRI, although the usually lengthy procedure has limited its use. A magnetic field measurement method called single scan differential phase mapping that can reduce the measurement time of conventional methods by more than half when used with multiple gradient‐recalled echo imaging was developed. An automatic high‐order shimming using the present method was implemented in a commercial MRI system. In vivo field inhomogeneity features and the shimming performances were investigated. The method was found to be useful for improving the quality of echo‐planar images.