Date of Award
Fall 1984
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Electrical and Computer Engineering
First Advisor
Schneider, Susan C.
Second Advisor
Horgan, James D.
Abstract
Magnetic Resonance imaging and spectroscopy requires a 1.5T magnetic field which is uniform over a volume. Oftentimes, the homogeneity of the central field of the magnet is perturbed by the presence of environmental iron and/or shielding iron. (Shielding iron is used to reduce the strength of the magnetic field beyond the shield.) In this thesis, spherical harmonics are used to describe the magnetic field generated by the magnetized materials. This is employed to aid in the design of passive shims. These pieces of iron located near the center of the magnet can be designed and positioned to correct the inhomogeneities in the central field of the magnet by counteracting the effect of the environmental and shielding iron.
Recommended Citation
Grigsby, Nancy S., "Magnetic Field Mapping" (1984). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4699.
https://epublications.marquette.edu/theses/4699