Comments on "Theoretical model for an MRI radio frequency resonator"

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.