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Quadrupole gradient coil design and optimization: A printed circuit board approach
Author(s) -
Chu Kenneth C.,
Rutt Brian K.
Publication year - 1994
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.1910310611
Subject(s) - electromagnetic coil , conductor , volume (thermodynamics) , materials science , nuclear magnetic resonance , resolution (logic) , electrical conductor , printed circuit board , root mean square , acoustics , optics , biomedical engineering , physics , composite material , computer science , quantum mechanics , artificial intelligence , medicine , operating system
Abstract Three different dual‐axis quadrupole gradient coils for quantitative high resolution MR imaging of small animals, phantoms and specimens were designed and built using printed circuit board technology. Numerical optimization of the conductor positions was used to increase the volume of 0.4% gradient uniformity by up to a factor of four. In one coil, the volume of 5% gradient uniformity occupied 88% and 83% of the overall diameter and length of the coil, respectively. A systematic error of 0.5% in the wire placement was shown to cause a reduction in the volume of 0.4% gradient uniformity by a factor of two, though the region of 5% gradient uniformity was not significantly affected. Heat transfer calculations were used to determine maximum peak and root‐mean‐squared currents that could safely be applied to the coils.