Premium
Harmonic structure of cylindrical imaging coils
Author(s) -
Harpen Michael D.
Publication year - 1990
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596467
Subject(s) - physics , resonance (particle physics) , harmonic , nuclear magnetic resonance , magnetic resonance imaging , limit (mathematics) , medical imaging , acoustics , atomic physics , mathematical analysis , mathematics , computer science , medicine , radiology , artificial intelligence
Presented is a derivation of an exact closed‐form expression for the spectra of resonant frequencies for magnetic resonance imaging birdcage coils in the limit of long coils with many elements. Results of the analysis are compared with observation in a variety of birdcage coils where it is shown that for even relatively short coils the progression of resonant frequencies are of the form ω m =ω 1 m ±1/2 +low pass; −high pass, with m integer and ω 1 the primary resonance.