Patent ID: 7642780
Filing Date: 2010-01-05
Classification: G01R

Abstract:
1. A magnetic resonance system comprising: a basic field magnet that generates a static, basic magnetic field in an examination volume; a whole-body antenna that emits a homogenous radio-frequency field in the examination volume, said radio-frequency field exhibiting an excitation frequency that causes atomic nuclei in an examination subject in the examination volume to be excited to emit magnetic resonance signals; a radio-frequency shield disposed between the whole body antenna and the basic field magnet; the whole body antenna being disposed between the radio-frequency shield and the examination volume; and said radio-frequency shield being configured to produce a high shielding effect in a shielding frequency range that encompasses said excitation frequency and that drops to a substantially lower shielding effect at both sides of said shielding frequency range at sidebands adjoining the shielding frequency range, and wherein said shielding frequency range and said sidebands each exhibits a bandwidth that is substantially smaller than said excitation frequency.