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On the field inhomogeneity of a birdcage coil
Author(s) -
Jin Jianming,
Shen Gary,
Perkins Thomas
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.1910320319
Subject(s) - electromagnetic coil , capacitance , capacitor , field (mathematics) , mechanics , physics , nuclear magnetic resonance , computer science , acoustics , mathematics , voltage , electrode , quantum mechanics , pure mathematics
A mathematical model is developed for the numerical analysis of birdcage coils constructed using capacitors having different capacitance. With the aid of this model, it is shown that the deviation of some capacitance introduced by tune, balance, and drive mechanisms can cause inhomogeneity in the B 1 , field produced by the coil. Useful curves and formulae are developed to provide a guideline for the design of birdcage coils.