Title :
Comments on "Theoretical model for an MRI radio frequency resonator"
Author :
De Zanche, N. ; Vermeulen, F.E. ; Allen, P.S.
Author_Institution :
Dept. of Biomed. Eng., Alberta Univ., Edmonton, Alta., Canada
fDate :
5/1/2002 12:00:00 AM
Abstract :
In contrast to a previous report [Baertlein et al., ibid., vol.47, p.535 (2000)], the transverse electromagnetic resonator used in magnetic resonance imaging is shown to be similar to the high-pass "birdcage" resonator in having an electric field minimum in correspondence with the maximum of the magnetic field. The noise performance of each resonator will, in consequence, be comparable, since at high frequencies patient conductive losses are predominant.
Keywords :
biomedical MRI; cavity resonators; coils; MRI radio frequency resonator; TEM coil; electric field minimum; high frequencies; high-pass birdcage resonator; magnetic field maximum; magnetic resonance imaging; noise performance; patient conductive losses; theoretical model; transverse electromagnetic resonator; Coils; Impedance; Magnetic fields; Magnetic noise; Magnetic resonance imaging; Maxwell equations; Multiconductor transmission lines; Radio frequency; Resonant frequency; Voltage; Electromagnetic Fields; Equipment Design; Magnetic Resonance Imaging; Models, Theoretical; Phantoms, Imaging; Radio Waves;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
